Trail Running calendar near Lake Sonoma 2026-2027

Test your endurance at Lake Merced in San Francisco with a scenic 4.5 mile loop course. Choose between a standard run or tackle ultra marathon distances including the 50K and 50 mile events.

Trail races around the San Pablo and Briones Reservoirs in the East Bay offering 35K, half marathon, 10K and 5K on single track and fire roads. Aid stations, limited field size, parking at the visitors center, and volunteer support.

Three cross-country races on October 11, 2026 at Miwok Meadows, China Camp State Park in San Rafael, CA, on a roughly 4.20 mile mostly single track course with a short paved section.

A multi-distance trail event at Lake Sonoma featuring 100 mile, 50 mile, marathon and 4-person relays, with extensive singletrack, lake views, on-site camping, designated aid stations, and crew access at several points.

Trail race at Bothe Napa Valley State Park on October 24, 2026 offering marathon, half marathon, 10K and 5K. The course runs on narrow trails with streams and hills and the field is limited to 300 participants.

A women focused trail half marathon in the Marin Headlands covering 13.6 miles with 2,156 feet of climbing, coastal ridgelines and views of the Pacific and Golden Gate Bridge. The event offers training plans, shuttles, childcare grants and..

The 28th Matt Yeo Memorial Aggie XC Open is a cross country meet at Radke Martinez Regional Shoreline on October 24 2026 featuring three races over a returned course shortened to 4.1 miles with grass, dirt, and path surfaces.

Trail races in Stinson Beach on November 7, 2026 with 10K, half marathon, 30K and 50K that climb Mt. Tam and return to the beach. Aid stations provide food and hydration and the event is limited to 500 runners.

Quad Dipsea in Mill Valley, CA is a 28.4 mile out-and-back trail race with about 9,000 feet of ascent, stairs and technical trails. The route reaches Stinson Beach and is run twice, with aid stations and enforced cutoffs.

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.

Peacock Gap Trail Run at China Camp State Park on December 5, 2026 offers 10K, half and 30K trail courses with marked single track and fire roads, chip timing, aid stations, and a cupless water policy.

An urban single loop starting at Twin Peaks that offers 50K and 50 mile routes. The fat ass style event uses volunteer aid from parked cars and includes a 4 hour 45 minute cutoff at mile 25.

A loop course around Angel Island with panoramic San Francisco views. Options include a half marathon of two laps and a single loop 10K, limited to 400 participants and with ferry fees included in race pricing.

Experience the magic of the Golden Gate Bridge and the Marin Headlands. This Spartan Trail event offers distances from 15k to 50 miles with panoramic mountain and sea views.

Experience the coastal beauty of the Marin Headlands at the Golden Gate Trail Run. Choose from distances ranging from a 50K trail race to a fun kids dash with views of the Golden Gate Bridge and San Francisco.

Experience a trail run across the forest and hills of Angel Island with views of San Francisco and the Golden Gate. Choose from multiple race distances including a youth dash and enjoy a picnic at Ayala Cove.

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.

A 50K trail race on Northern California’s Mendocino Coast, starting at Big River State Beach and passing river, ocean, redwood and waterfall scenery. Races are listed in April with recent dates including 2025 and 2027.

Trail races of half marathon, 10K and 5K take place at Spring Lake and Annadel State Park on April 17, 2027, featuring technical, hilly terrain, three aid stations, chip timing, and a cup free policy requiring reusable bottles.

The Muir Woods Marathon will take place in Stinson Beach on Saturday 1 May 2027. You can run between 7 and 42 kilometers.