Sunday, April 27, 8:30 a.m.–12:30 p.m.
Meet: Barnard Avenue (at Lincoln) behind Presidio YMCA
This challenging course winds through the Presidio trail system with beautiful overlooks and passes through newly opened portions. Choose a 10K, 5K or 1.5 mile-course. Proceeds support the Presidio YMCA’s youth development, healthful living and social responsibility programs. $13–$50, 415-447-9622, http://presidiotrailsrun.eventbrite.com