North Face Endurance Challenge
Saturday, Nov. 18 to Sunday, Nov. 19, 2017
Crissy Field, San Francisco

New dates, new location, same great collection of trail runs (5K to 50 miles)

Note that the half-marathon and longer races start in Sausalito; the shorter races (including the marathon relay) start on Crissy Field.

https://www.thenorthface.com/get-outdoors/endurance-challenge/california.html