Recreation Calendar 

Our annual guide to Northern California's summer recreation season.

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May

Canyon Meadow Trail Run This close-to-home race travels along the East Ridge and West Ridge trails in Oakland's Redwood Regional Park. Five distances to choose from: five-mile, half-marathon, 30K, marathon, and 50K. Sat., May 31, at 7867 Redwood Rd., Oakland. 8 a.m., $40-$65. CoastalTrailRuns.com

Mud on the Farm Get down and dirty at Dell'Osso Farm in Lathrop. This 5K mud run and obstacle course comes complete with trophies and prizes. Sat., May 31, at 501 Manthey Road. 8 a.m., $45-$75. MudontheFarm.com

Nitro Trail A half-marathon, 10K, and 5K trio presented by the East Bay's Brazen Racing team. All take place in Point Pinole Regional Shoreline Park, which offers views of the bay, wildflowers, more than 100 species of birds, and eucalyptus woodlands. Sat., May 31, at 5551 Giant Highway, Pinole. 8:30 a.m., $39-$70. BrazenRacing.com

Prairie City Race Series California's largest weekly mountain bike and cyclocross race event, Prairie City is a ten-race series with hundreds of riders each week and multiple waves. Races occur on Wednesday evenings from April through June; remaining dates include May 21 and June 4 and 11. At Prairie City State Vehicle Recreation Area, Rancho Cordova. 5:45 p.m., $10-$35. RaceMTB.com

Wounded Warriors 5K Run/Walk This Memorial Day 5K run/walk honors all who have served in the US military. The event also includes a car show, helicopter landings, fly-overs, music, and more. Sun., May 25, at Woodward Park, Manteca. 8 a.m., $25. OnYourMarkEvents.com

June

Alcatraz Sharkfest Swim Put this one on your calendar for 2015; as always, it sold out months ahead of race day. A challenging race for experienced open-water swimmers, the event is limited to 800 entrants. Alternately, swim the exact same 1.5-mile course via swim-only registration at the Escape from the Rock duathlon in mid-July. Sat., June 7, at Aquatic Park. 8:20 a.m., $125-$175. SharkfestSwim.com

The Best of the Bay Century The Cherry City Cyclists of San Leandro string together some of the finest cycling roads throughout the East Bay in this epic ride. Sections include Bear Creek Road, Happy Valley, Wildcat Canyon, South Park, Grizzly Peak, and more. Course options allow participants to the make the ride as long and as challenging as they wish, from moderate to extremely challenging. Sat., June 21, at Orinda Community Park. 6 a.m., $70-$100. CherryCityCyclists.org

Berry Creek Falls Trail Run Named for the 65-foot Berry Creek Falls, located along the course route, this run features a wide range of habitats including grand old redwoods, steep wooded canyons, and dry ridge-tops. Distances of 10K, 15K, and 25K. Sat., June 7, at Big Basin Redwood State Park, Boulder Creek. 8 a.m., $40-$50. CoastalTrailRuns.com

Big Basin Marathon/50K Follow the popular Skyline to the Sea Trail from the crest of the Santa Cruz Mountains through Big Basin Redwoods State Park to the Pacific Ocean at Waddell Beach. Sun., June 8, at Saratoga Gap, Los Gatos. 9 a.m., $75-$80. CoastalTrailRuns.com

Burlingame Criterium A 0.7-mile bike circuit through downtown Burlingame for cyclists of all levels, with tight turns and a sprint finish. Multiple competitive categories with forty- to sixty-minute durations and cash prizes, plus a free ninety-minute kids' race. Sun., June 22, at Burlingame and Lorton aves. 7 a.m., $40-$45. BurlingameCriterium.com

California Sprint Triathlon Stay in the East Bay for this one: a 1/2-mile swim, 13-mile bike ride, and 3.1-mile run at Pleasanton's Shadow Cliffs Regional Park. Sat., June 29. 8 a.m., $75-$120. Or, the following day, race the California International Triathlon at the same location, featuring a 1.5K swim, 40K ride, and 10K run. 7 a.m., $105-$150. Relay option available for both. USAProductions.org

Catfish Open-Water Swim A swim-only event. Take your pick of a 2.4-mile (adults only), 1.2-mile (adults only), or 500-yard (adults and youth) swim — all in Fremont's Quarry Lakes. Sat., June 14. 8 a.m., $30-$95. USAProductions.org

Dick Houston Memorial Woodminster Cross-Country Race The third and final race in the East Bay Trail Championships Triple Crown series. This scenic, nine-mile loop on trails in Oakland's forested Joaquin Miller Park, now in its 49th year, features plenty of hills and a killer climb known affectionately as "the Woodmonster." Sun., June 22, in the Pinewood Picnic Area at 3600 Joaquin Miller Rd. 9 a.m., $20-$25. LMJS.org

Dipsea Race Founded in 1905, the oldest trail race in America travels 7.4 gorgeous miles though Stinson Beach, Muir Woods, and Mt. Tamalpais State Park. The field of 1,500, managed with handicapped start times, is already full — so mark your calendar for next year. Sun., June 8, in downtown Mill Valley. Dipsea.org

The Dream Mile An annual outing in ten cities across the country organized to benefit Vibha, a nonprofit that aids underprivileged children in the United States and India. Half-marathon, 10K, and 5K courses are offered, complemented by a carnival with games and activities. Sun., June 1, at Hellyer County Park in San Jose. 7:30 a.m., $25-$80; free for children under twelve. TheDreamMile.org

Du-TOES If you've always wanted to do a triathlon, but don't like to swim, this event is for you: a run/bike/run duathlon or run/bike/kayak triathlon (your choice). Two kayak course lengths available: two miles or four miles. Relay option available. This is a USAT-sanctioned race. Sat., June 21, at San Pablo Reservoir in Orinda. 8 a.m., $70-$92. WolfPackEvents.com

Folsom Sprint, International, and Long-Course Triathlons Hosted by USA Productions in and around Folsom Lake outside Roseville, the sprint features a 1/2-mile swim, 19-mile bike ride, and 3.1-mile run; the international-length race features a 1.5K swim, 40K ride, and 10K run; and the long-course race features a 1.2-mile swim, 56-mile ride, and 13.1-mile run. Aqua-Bike and relay options available. Sun., June 8, at Nimbus Flat State Park, Folsom. 7 a.m., $75-$210. USAProductions.org

Forest of Nisene Marks Marathon A coastal setting naturally cooled by fog leaves runners to focus on the important details: hilly and steep terrain on a mix of roads and single-track trails that course through a beautiful redwood forest. Event also includes 5K and half-marathon courses. Limited to 400 participants in all three races. Sat., June 7, at Forest of Nisene Marks State Park, Aptos. 8 a.m., $25-$75. NiseneMarksMarathon.com

Full Moon/Sunset Paddle This romantic, UC Berkeley-sponsored excursion leads participants beyond the Golden Gate in tandem sit-on-top kayaks to watch the sunset and the full moon rise above the East Bay hills. Previous paddling experience recommended; swimming ability required. Thu., June 12, at the UC Aquatic Center at the Berkeley Marina, 122 University Ave. 7 p.m., $35-$45. (Other dates: Sat., July 12 and Sun., Aug. 10.) Sunset paddles also available on new moon days: Sat., June 14, Sat., July 5, and Sat., Aug. 2. RecSports.Berkeley.edu

Golden Gate Sharkfest Swim Have what it takes to swim 1.6 miles in the bay under the Golden Gate Bridge? Swimmers will be transported by ferry to the south tower of the bridge, then swim back past the north tower to finish at Horseshoe Cove in Sausalito. Sat., June 21, at Parking Lot 4 in Sausalito. 8:45 a.m., $175. SharkfestSwim.com

Hook and Ladder Run The sixth-annual running of this benefit for the Livermore-Pleasanton Firefighters Foundation includes a 5K run/walk, 10K run, and kids' one-mile fun run. Sun., June 1, at Wente Vineyards, Livermore. 8 a.m., $15-$45. OnYourMarkEvents.com

Kaiser Permanente Women's Fitness Festival This tenth-annual festival features a half-marathon run and a 5K run/walk. Proceeds benefit WEAVE, which fights domestic violence and sexual assault. Preceded by a fitness festival and expo. Sun, June 8, at the Capitol Mall. 7:15 a.m., $36-$70. WomensFitnessFestival.com

Lake Chabot Trail Challenge Hosted by the Castro Valley Track Club, this is the second race in the East Bay Triple Crown Trail Championship. It's a hilly, 13.1-mile run around and above Lake Chabot, offering great scenery and East Bay views. A 5K race is also featured. Sun., June 1, at the Lake Chabot Marina. 8 a.m., $30-$60. CVTrackClub.com

Luv Run San Francisco A 5K run that doubles as a singles mixer — runners wear bibs announcing their relationship status. (Those in relationships are welcome to join, too.) Sun., June 29, at Crissy Field. 8:30 a.m., $55. LuvRun.com

Orca Alcatraz Challenge Aquathalon/Swim Swimmers flock from around the world to escape Alcatraz by fighting strong currents and frigid water. Swim distance totals 1.5 miles, followed by an optional 7-mile run through the Presidio and across the Golden Gate Bridge. Youth and adult divisions; relay option available. Sun., June 29, at the East Beach of Crissy Field in the Presidio. 8 a.m., $75-$180. TriCalifornia.com

San Francisco Marathon The only race to run the roadbed of the Golden Gate Bridge (instead of the sidewalks), the San Francisco Marathon features a full marathon, two half-marathons (runners can choose which half), and a 5K. The full course starts and finishes on the Embarcadero near the Ferry Building and encircles the northern half of the city. Back by popular demand: the 52.4-mile double-marathon. Sun., July 27. 5:30 a.m., $45-$300. TheSFMarathon.com

San Lorenzo River Trail Run Experience 300-foot-tall, 1,500-year-old redwoods; lush stream canyons; open meadows; pine and oak forests; and chaparral-covered ridges on this race with five distances ranging from 10K to 50K. Sat., June 21, at Harvey West Park, Santa Cruz. 8 a.m., $40-$65. CoastalTrailRuns.com

San Francisco Summer Solstice 6, 12, and 24-Hour Run Run for hours while testing your limits and aiming for a personal record on a precisely measured USATF-certified course around the Crissy Field lagoon measuring 1.061 miles. Sat., June 21, at Crissy Field. 8 a.m., $60-$130. PCTrailRuns.com

See Jane Run Alameda Women's Half-Marathon and 5K A "celebration of women of all sizes, ages, and fitness levels," this flat race takes place along Alameda's Bay Trail and offers views of San Francisco and the Bay Bridge. Also includes a one-mile kids' run. Sun., June 22, at Crown Memorial State Beach, Alameda. 8 a.m., $22-$95. SeeJaneRun.com

Sonoma County Hot Air Balloon Classic Two days of hot-air ballooning, food, crafts, tethered balloon rides, and other fun — including plenty of kid-friendly entertainment. Organizers call it "a celebration of Wine Country's most beautiful sites" and "a day to be remembered," even if weather grounds balloons from flying any higher than 100 feet. Sat. and Sun., June 14-15, at Keiser Park, 700 Windsor Rd., Windsor. 6:30 a.m., $6-$10; free for kids under six. SCHABC.org

Statuto Race Now in its 94th year, the Statuto Race offers a taste of Italy in San Francisco's North Beach neighborhood. Hosted by the San Francisco Italian Athletic Club, the event features a five-mile race and a two-mile walk. Proceeds benefit Stand Up to Cancer. Sun., June 1, at 1630 Stockton St. 9 a.m., $25-$30. SFIAC.org

Tahoe Rim Trail 165-Mile Segment Hiking Program Complete the 165-mile Tahoe Rim Trail in manageable segments over the course of the summer, either on Wednesdays or Fridays. Like-minded outdoors enthusiasts and knowledgeable volunteers from the Tahoe Rim Trail Association will join and assist you. Registration is full for this year, so plan for 2015. $550. TahoeRimTrail.org

Thunderbird Paddleboard Race An eight-mile stand-up and prone paddling race, plus youth races on a buoy course near shore and stand-up paddling demonstrations. Sat., June 14, at Sand Harbor, Lake Tahoe Nevada State Park. 10 a.m., $16-$51. BigBlueAdventure.com

Trail Quake 2014 So named because it travels the San Andreas Trail, Trail Quake offers racers three distances to choose from: 5K, 10K, and half-marathon. The longer runs ascend peaks offering spectacular views of the South Bay, the Peninsula, and beyond, while all three make use of narrow single-track trails. Sat., June 14, at Sanborn County Park, 16055 Sanborn Rd., Saratoga. 8 a.m., $40-$75. BrazenRacing.com

Tri for Fun The first of three non-competitive, short-distance triathlons taking place at Shadow Cliffs Regional Park in Pleasanton throughout the summer. Each features a 400-yard swim, an 11-mile bike ride, and a 3.1-mile run. The series is designed for novices, but can also offer great training and time-trial opportunities to experience triathletes. Relay option available. Sun., June 8. 7 a.m., $65-$73. (Other dates: Sat., July 19, and Sat., Aug. 16.) OnYourMarkEvents.com

Walt Stack DSE Double Dipsea Run the Dipsea — twice. This highly challenging course, Walt Stack's favorite, has about 4,500 feet of elevation gain and is organized as a handicap race. For 2014, the Dolphin South End running club has partnered with Brazen Racing for the first time to continue the tradition. Sat., June 21, at Stinson Beach. 8 a.m., $60-$80. BrazenRacing.com

XTERRA Tahoe City Triathlon An off-road tri featuring a swim in Lake Tahoe and a ride and run on trails in North Lake Tahoe. Sprint and duathlon options available. Sat., June 28, at Commons Beach, North Lake Tahoe. 8 a.m., $71-$136. BigBlueAdventure.com

Vineman Monte Rio Now in its second year, this Olympic-distance tri in the town of Monte Rio features a 1.5K swim (in the Russian River), 40K bike (from Monte Rio to Jenner and back), and 10K road run (flat, fast, and shaded). Sun., June 8, at Russian River Rodeo Grounds. 7 a.m., $115-$195. Vineman.com

July

Alcatraz "Escape from the Rock" Duathlon This 34-year-old San Francisco tradition begins with a 1.5-mile swim through sixty-degree waters from Alcatraz Island to the shore and concludes with a 7-mile run to Fort Point and Aquatic Park. Limited to 400 participants. Relay option and swim-only registration also available. Sun., July 20, at Aquatic Park. 8:10 a.m., $150-$175. EnviroSports.com

Bad Bass Half-Marathon/10K/5K Brazen Racing encourages you to "run like a bad bass at Lake Chabot" at this annual event. The 5K is mostly on paved trails and includes small hills; the 10K and half-marathon spend half their time on dirt and include one major hill. Sat., July 26, at the Lake Chabot Marina. 8 a.m., $44-$75. BrazenRacing.com

Barb's Race A women-only long-course triathlon featuring a 1.2-mile swim, 56-mile ride, and 13.1-mile run. In fact, it's the only all-women's half-distance triathlon in the world! Field limited to 450 participants, who are required to fundraise a minimum of $250 by June 30. Saturday, July 26, at Johnson's Beach, Guerneville. 6:30 a.m., $150-$175. Vineman.com

The Berkeley Kite Festival Presented by Highline Kites of Berkeley, the annual Berkeley Kite Festival is a one-of-a-kind full-day event for kite aficionados and the curious alike. Includes free kite-making, kite-flying lessons, a Rokkaku battle, and more. Sat. and Sun., July 26-27, at Cesar E. Chavez Park at the Berkeley Marina. 10 a.m., free. HighlineKites.com

Davis Moo-nlight Race Held on a Saturday evening in Cowtown, this half-marathon, 10K, and 5K race with a glow-in-the-dark theme reaches into the evening hours. A half-mile fun run is also offered for kids age twelve and under. Sat., July 12, in Davis (location TBA). 6:15 p.m., $10-$56. ChangeofPace.com

Dirty Dozen and Half-Dozen Endurance Run Do you have what it takes to go for six or twelve hours straight? Test your mettle with this run at Point Pinole Regional Shoreline along a gentle, 3.4-mile loop consisting primarily of dirt fire trails. The race can be done solo or in teams of two or three runners. (Or, opt for the 5K or 10K course.) Sat., July 12. 7 a.m., $44-$100. BrazenRacing.com

Donner Lake Triathlon This huge triathlon event allows participants to swim in the beautiful, clear water of Donner Lake, bike along Highway 40 for spectacular views of the alpine lake, and finally run another course around the lake. Various distances and age classes offered over two days, including a kids' triathlon. Relay option available. Sat. and Sun., July 26-27, at West End Beach, Donner Lake, Truckee. 7 a.m., $46-$261. DonnerLakeTri.com

Eppie's Great Race This "no-swim" triathlon, now in its 41st year, combines running (5.82 miles), biking (12.5 miles), and paddling (6.35 miles) along the scenic American River Parkway. It's also the largest paddling event in the United States. Multiple age divisions and relay options. Sat., July 19, at Rod Beaudry Dr. and Folsom Blvd., Sacramento. 8 a.m., $30-$190. EppiesGreatRace.org

Fall River Century Ride through spectacular Northeastern California scenery in a valley situated between Mt. Lassen and Mt. Shasta. Four course options: 200K, 100 mile, 100K, and 25 mile. Preceded by a pancake breakfast and followed by a three-course dinner. Sat., July 19, in Fall River Mills. 7 a.m., $30-$65. FallRiverCentury.com

Golden Gate Trail Run Beginning at Rodeo Beach in Sausalito, this race offers views from the Marin Headlands of Tiburon, San Francisco, and that famous bridge. Five distances offered. Sat., July 12. 8 a.m., $40-$65. CoastalTrailRuns.com

Healdsburg Harvest Century Bicycle Tour An annual tour — not a race! — through the heart of Sonoma County wine country, a region named by Bicycling magazine as one of "The Seven Greatest Rides on Earth." Three distances available: 60, 37, or 23 miles. Includes two rest stops and a barbecue lunch. Proceeds benefit the Healdsburg Chamber of Commerce and Visitors Bureau. Sat., July 19. 6:30 a.m., $65-$85. Healdsburg.com/biketour

Hernia Hill at Twisted Oak Winery Visit the small town of Vallecito, located near historic Murphys along Highway 4, for this unique event featuring a half-marathon, 10K run, and 5K run/walk. Post-race lunch and wine tasting. Sat., July 5, at 4280 Red Hill Rd., Vallecito. 8 a.m., $35-$40. OnYourMarkEvents.com

Pacifica Trail Run Tackle distances of 10K, 21K, 30K, or 50K on scenic trails nestled between the Santa Cruz Mountains and the foothills of Pacifica. Sat., July 12, at San Pedro Valley Park, Pacifica. 8:30 a.m., $35-$80. PCTrailRuns.com

Pleasant Hill Firecracker 5K Fun Run This 5K run/walk leads through downtown Pleasant Hill along the same course as the Fourth of July parade, which begins immediately after the race. A 100-yard dash for kids will also be held. Proceeds benefit local schools. Fri., July 4, at 45 Crescent Dr. 8 a.m., $25-$40; free for children under seven. PHJuly4.com

Run to the Lake This benefit for Eden Medical Center's Trauma Center features a 5K run/walk, a 10K run, and a 50-yard kids' dash. The course heads from Eden Medical Center to Lake Chabot Regional Park and back. Sun., July 13, at 20103 Lake Chabot Rd., Castro Valley. 8 a.m., $11-$30. EdenMedCenter.org

San Rafael Twilight Criterium Described as a "nightclub on wheels," this 1-kilometer criterium runs through downtown San Rafael. Sat., July 26, at 4th St., San Rafael. 1:30 p.m., $25-$30. SRT.ProjectSport.com

SPASM Lake Chabot Trail Run The popular trails encircling Lake Chabot host this new race sponsored by Southbay Pain and Sports Medicine. Distances from five miles to 50K. Sat., July 19, at the marina of Lake Chabot Regional Park in Castro Valley. 8 a.m., $40-$65. CoastalTrailRuns.com

Tahoe Trail 100K MTB Race A 100K (62-mile) mountain bike race on top-quality Lake Tahoe Trails. Team and 50K options also available. Starts and finishes at Northstar at Tahoe. Sat., July 19. 7 a.m., $75-$120. TahoeTrailMTB.com

Tiburon Triathlon The 24th running of the Tiburon Triathlon, presented by the Tiburon Fire Department and benefiting the Tiburon Volunteer Firefighters Association, takes place around Belvedere Community Park and features a half-mile swim, a nine-mile bike ride, and a two-mile run. Team option available. Sun., July 27. 7:30 a.m., $75. TiburonFire.org

Vineman Full Triathlon Established in 1990, Vineman is the oldest independent Ironman-distance triathlon in the continental United States. It's also no joke, with a 2.4-mile swim, a 112-mile bike ride, and a 26.2-mile run. Half- and full-distance AquaBike (i.e., no run) races also offered. Sat., July 26, at Johnson's Beach, Guerneville. 6:30 a.m., $375-$475. Vineman.com

Vineman Ironman 70.3 Triathlon Consider this the half-Vineman; it includes a 1.2-mile swim, 56-mile ride, and 13.1-mile run through Sonoma County wine country. Limited to 2,300 entrants and already sold out for 2014. No relay option. Sun., July 14, at Johnson's Beach, Guerneville. 6:30 a.m., $295-325. Vineman.com

Woodside Half-Marathon and 5-Mile Run through redwood and oak forests above the town of Woodside. Sat., July 26, at Huddart Park, Woodside. 9 a.m., $40-$55. EnviroSports.com

August

Aloha Celebrity Races and Polynesian Festival Designed for novice paddlers, these races, now in their 22nd year, offer a chance to discover the excitement of outrigger canoe racing. After the races, visit the Polynesian Festival for a taste of the tropics. Sun., Aug. 24, at the Santa Cruz Wharf. 11 a.m., free. CityofSantaCruz.com

Angel Island 12K and 25K Circumnavigate Angel Island once — or twice, for the longer run — and enjoy panoramic views of the Golden Gate Bridge, Alcatraz Island, San Francisco, Marin County, and the East Bay. Sat., Aug. 16, at the Tiburon Ferry Dock, 21 Main St., Tiburon. Ferry departs 8 a.m., $55-$60 (includes ferry fee). EnviroSports.com

Bear Creek Half-Marathon/10K/5K A scenic, hilly race on fire roads and single-track trails throughout Briones Regional Park. All three courses are loops. Organized by East Bay running club Brazen Racing. Sat., Aug. 18, at Bear Creek Staging Area, Bear Creek and Briones rds., Martinez. 8 a.m., $39-$70. BrazenRacing.com

California Kids Triathlon One of the United States' largest kids' triathlons, this event is intended for children ages three through eighteen, regardless of athletic ability or prior triathlon experience. The six different courses and distances are designed to be achievable for all athletes and are presented in a non-competitive format. Sun., Aug. 3, at Arroyo Park, 2000 Shasta Dr., Davis. 8 a.m., $30-$45. ChangeofPace.com

Cinderella Trail Run Head to Joaquin Miller Park, one of Oakland's most beautiful spots, for a 5-, 13.1-, 18.6-, 26.2-, or 31-mile run. Sat., Aug. 16, at Joaquin Miller Park. 8 a.m., $40-$65. CoastalTrailRuns.com

Crystal Springs Trail Run More redwoods, ferns, and gorgeous vistas from Coastal Trail Runs. Five race distances from five miles to 50K. Sat., Aug. 9, at Huddart Park, Woodside. 8:30 a.m., $40-$65. CoastalTrailRuns.com

Dammit Run This annual five-mile race, now in its 41st year, starts on the Los Gatos High School track, travels alongside a creek, progresses over a series of wooded hills, and finishes with a downhill descent and another flat. Proceeds benefit Los Gatos High School. Sat., Aug. 9, at 20 High School Ct., Los Gatos. 8:30 a.m., $30-$50. LosGatosDammitRun.com

Golden Gate Du As a triathlon alternative, try a duathlon short course (two-mile run, 22-mile bike, 1.8-mile run) or long course (3.6-mile run, 40-mile bike, 3.4-mile run). Or run/walk a 3.6-mile course. Relay option available. All take place at the San Pablo Reservoir, Orinda entrance. Sat., Aug. 9. 8 a.m., $25-$90. WolfPackEvents.com

Iron Hills Youth Triathlon Features various distances and age categories for kids fifteen and under. The swim portion is held in a 25-yard pool, the bike portion takes place on paved and dirt roads within CSD Community Park, and the run is on grass fields with some paved stretches. Sat., Aug. 9, at 1021 Harvard Way, El Dorado Hills. 8:30 a.m., $40-$50. CapitolAdventureRacing.com

Lake Tahoe Sharkfest Swim Sharks in Lake Tahoe? Nope. But this one-mile open-water swim will still put you to the test. Youth and adult divisions. Sun., Aug. 24, at Sand Harbor State Park, Lake Tahoe. 8:30 a.m., $30-$70. SharkfestSwim.com

Lake Tahoe Triathlon This two-day event offers a bevy of options: open-water swim, duathlon (run-bike-run), and sprint-, Olympic-, and half-distance triathlons. All take place at Ed Z'berg Sugar Pine Point State Park. The bike courses are paved, while the runs are on both trails and roads. Relay option available. Sat. and Sun., Aug. 23-24. 7 a.m., $76-$261. LakeTahoeTri.com

Marin Century and Mt. Tam Double Six fully supported routes ranging from 30 to 200 miles and attracting more than 3,100 riders from the Bay Area and beyond. None of the events are considered races, and there will be no winners named. Sponsored by the Marin Cyclists bike club; proceeds benefit nonprofits. Sat., Aug. 2, at 50 Nova Albion Way, San Rafael. 5 a.m., $50-$105. MarinCyclists.com

Mt. Shasta Summit Century Bike Ride Organizers promise challenging climbs, breathtaking views, and lightly traveled rural roads. Distances include 30 miles, 60 miles, 100 miles, and a "super century" at 138 miles and 16,500 feet of elevation gain. Sun., Aug. 3, at Mt. Shasta City Park, 1315 Nixon Rd. 5:30 a.m., $40-$90. ShastaSummitCentury.com

Race Thru the Redwoods 10K No surprises here: Run 6.2 miles through the redwoods of Henry Cowell State Park in Felton. There's also a one-mile kids' fun run, preceded by a pancake breakfast. Limited to seven hundred entrants. Sun., Aug. 17. 8:10 a.m., $15-$30. RaceThrutheRedwoods.com

Salt Point Trail Run Held in Salt Point State Park on the Sonoma County coast, this race features distances of 9K, 15K, 26K, and 50K. Sandstone cliffs, kelp-speckled coves, tide pools, pygmy forests, and panoramic views await. Sat., Aug. 2. 8:30 a.m., $35-$80. PCTrailruns.com

San Francisco 50 & 100 Mile Endurance Runs The name says it all: Run one or two laps on a 25-mile loop through the Marin Headlands with views of Tiburon, San Francisco, and the Golden Gate Bridge. Sat., Aug. 2, at Rodeo Beach, Sausalito. 7 a.m., $90-$200. CoastalTrailRuns.com

Skyline 50K Endurance Run This scenic and moderately hilly loop course travels through East Bay regional parks from Lake Chabot Marina to Skyline Gate in the Oakland hills and returns along the Skyline National Recreation Trail — with plenty of single-track trails and ridgeline running. Post-race barbecue and pig roast. Sun., Aug. 3, at the Lake Chabot Marina. 7 a.m., $80-$90. Skyline50K.com

Summer Breeze Take your pick: half-marathon, 10K, or 5K — all of which are flat, fast, and scenic, and travel along the bay shoreline in San Leandro and Hayward. Sat., Aug. 2, at San Leandro Marina Park. 8 a.m., $34-$65. BrazenRacing.com

The Town's Half Marathon A new half-marathon takes you on a scenic tour through Oakland: through Jack London Square, around Lake Merritt, and down Piedmont Avenue and Broadway, ending at City Hall. Sat., Aug. 16, at Frank Ogawa Plaza. 7 a.m., $79-$109. RunOak.com

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