Sunday, Dec. 8, 9:30 a.m.
Check in: The 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 through the Castro. Participants must raise $125; registration fee applies. $35, 415-487-3065, santaskivviesrun.org