Sunday, Dec. 11, 9:30 a.m.
Check in: Lookout (3600 16th St.)
Don your favorite festive costume, or strip down to your undies to raise awareness and fight HIV/AIDS and benefit the S.F. AIDS Foundation in this approximately one-mile run, walk, scooter, skip, or skate through the Castro. Includes a pair of Santa Skivvies and after party. $40, 415-487-3000, santaskivviesrun.org
