Fairfax
Trail Running Calendar near Fairfax 2026-2027
Explore the top trail runs near Fairfax for 2026-2027! We've gathered 50 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
October 2026
Cross-country meet at Radke Martinez Regional Shoreline on Oct 24, 2026 featuring three 4.1 mile races over grass, dirt, and path; online registration closes Oct 23.
Virtual worldwide challenge and an in-person gathering at the San Francisco Ferry Building on October 24, 2026, fundraising for the Breast Cancer Research Foundation.
November 2026
Support student programs and the Oakland Tech Cross Country team at Joaquin Miller Park. Choose between a five kilometer trail race or a one mile fun run through the redwood trees.
Trail races from 10K to 50K around Mt Tamalpais, held at Stinson Beach with technical trails, significant climb, cupless aid stations, and chip timing.
A Thanksgiving Day 5K and 1 mile event at San Leandro Marina with canicross teams, kids races, and proceeds benefiting animal welfare; the course is flat with mixed surfaces and free parking is available.
Quad Dipsea is a 28.4 mile out and back on the Dipsea Trail from Old Mill Park to Stinson Beach and back, featuring stairs and about 9,000 feet of vertical.
December 2026
A seasonal cross country event in San Francisco on 12/6/2026 with live and virtual options. Distances include a 5K, 10K, and a nine mile course; all entrants receive race swag and there is a pre race bib and shirt pickup with Brewfest.
Trail races of 30K, half marathon and 10K at China Camp State Park near San Rafael, with chip timing, cupless aid stations, and bay and Mt. Tam views.
An urban single loop ultra in San Francisco offering 50 mile and 50K options starting and finishing at Twin Peaks with volunteer aid stations at approximate mile markers.
A hilly loop around Angel Island with views of the Golden Gate and Alcatraz, offering a Half Marathon (two laps) and a single-loop 10K; limited to 400 entrants.
January 2027
A trail running event that crosses the Golden Gate Bridge into the Marin Headlands. Races include 15K, 25K, 50K and 50 mile options on January 23 to 24, 2027, organized by Spartan Trail.
February 2027
March 2027
A three day trail running weekend in Marin County offering a point to point 100K plus single loop 50K and 28K that summit Loma Alta and Big Rock Ridge.