Saturday, May 21, 8 a.m.–8 p.m.
Sports Basement, the Presidio
This all-day, app-based scavenger hunt through San Francisco has 100-plus riddles that lead to unique locations in S.F. Teams run, bike, and take public transit to get to each spot and upload a photo/video once there as their answer. A portion of proceeds benefits charity. $50, 415-317-4953, thesfhunt.com