If you consider yourself an expert in all things Oakland, the Oakland Greenways map adventure hosted by Terraloco on Saturday will be your chance to prove it. The course starts by the Leaning Tower of Pizza (498 Wesley Ave., Oakland), where you’ll pick up your map and plot out your route. The goal is to reach all the checkpoints (six for the 5K, ten for the 10K) within the allotted distance or, if you’re feeling competitive, the fastest amount of time. Wind your way through the Oakland Hills’ hidden pathways to the marked locations, and scan your chip at the orange-and-white flag identifying the checkpoint — which may be a tree or a historical monument. Do the course with a team or take it on alone for sole bragging rights. After you finish, head back to Lake Merritt to find out who came in first, boast about your cartographic prowess, and enjoy some refreshments.