Sutro Project / Dipsea Race
America's oldest trail race, the Dipsea runs from Mill Valley to Stinson Beach (through Tamalpais Park) the second Sunday of every June - registration for the grueling 7.4 mile race fills months before, and even spectating is difficult... but what's life without a challenge? Stinson Beach is the spot to cheer finishers!
Website: http://www.dipsea.org/
