Trail Running calendar near Lake Sonoma 2025-2026

Run Krampus Cross Country in San Francisco live on Dec 7 or virtually Dec 5 to 8 with 5K 10K and the Naughty Nine Miler. All entrants get a wooden woodallion a Krampus tee and a beer sampler stein plus a brewfest on Dec 5.

Tackle scenic trails at China Camp State Park in San Rafael with 30K, half marathon, or 10K options on December 6, 2025. Technical single track and fire roads, chip timing, and cupless aid stations make this a gritty, well supported winter..

Run the iconic Hunter S. Thompson Fear & Loathing in San Francisco on December 7, a free grassroots single loop that winds past city landmarks and finishes at Twin Peaks. Choose 50 mile or 50K distances and help support Shoes For Runners.

Experience a scenic loop around Angel Island with views of the Golden Gate and Alcatraz at the 37th Hark the Herald, offering a half marathon and a hilly 10K. Limited to 400 runners, includes ferry transport and finisher swag.

The Golden Gate Trail Classic will take place in San Francisco from Saturday 24 January 2026 to Sunday 25 January 2026. You can run between 15 and 50 miles.

Run scenic coastal trails in the Marin Headlands at the Golden Gate Trail Run in Sausalito offering distances from 8K to 50K plus a kids dash. Expect rugged views, stocked aid stations and finisher medals for all.

Experience panoramic Bay views on the hilly trails of Angel Island with 5, 10, and 15 mile options and a free kids dash. Finishers earn custom medals and pre registered runners receive shirts; a charter ferry from Tiburon is required.

Tackle scenic trails at China Camp State Park in March 2026 with in person or virtual 5K, 10K, and a challenging half marathon. All entrants receive a beer sampler stein, event shirt, and handcrafted woodallion.

Challenge yourself on classic Marin trails with towering redwoods, coastal ridges and sweeping bay views starting at Rodeo Beach. Choose a 50 mile or 50K route over technical single track and fire roads for a true Bay Area ultrarunning expe..

Three days of scenic trail running in Marin County with routes summiting Loma Alta and Big Rock Ridge and sweeping Bay Area views. Choose from 28K, 50K or a point to point 100K for a well supported race weekend.

Scenic single track trails, hills and streams in Bothe Napa Valley State Park near Saint Helena host marathon, half and 10K races on March 21, 2026. Limited to 300 runners, the event offers T shirts and medals for the marathon and half.

Run the Lag Bon 10K on March 22 in Fairfax on a scenic, technical Lagunitas trail with roots, rocks and muddy sections. This small charity race supports World Water Day with proceeds to safe water programs and runners get a shirt and medal.

Run scenic single track and fire roads above the Golden Gate Bridge at the Golden Gate Headlands Marathon, Half Marathon and 10K on April 4, 2026. Limited to 400 spots, this race delivers sweeping bay and ocean views.

Run around Angel Island for stunning views of the Golden Gate, Alcatraz and San Francisco in a scenic but hilly 10K or half marathon loop. Limited to 400 runners, ferry transport and a finisher shirt are included for participants.

Run scenic, challenging trails at Lake Sonoma Recreation Area with 100K, 50K and the women only Trail Sisters Half. The 100K is a Western States qualifier and courses feature big climbs, lake views and hearty aid stations.

Tackle the trails of Napa Valley at the Napa Valley Endurance Run in scenic Calistoga with options from 10K to 50K on rugged singletrack and fire roads. Finishers get a custom medal and shirt, with aid stations and awards.

Run the Mendocino Coast 50K for a scenic trail challenge along Northern California's rugged Pacific shoreline. Start at Big River State Beach and finish above Mendocino Village while crossing rivers, redwood groves and ocean bluffs.

Run the scenic trails of Annadel State Park at the Annadel Half Marathon in Santa Rosa on April 18, 2026, with half marathon, 10K, and 5K options for all paces. Proceeds support Trione Annadel State Park and Sonoma County Parks Foundation.

Hit the trails at the Mt Tam Wild Boar Half Marathon or 10K along Bolinas Ridge with stunning Pacific and lagoon views. Limited to 300 runners, this intimate trail race returns April 25, 2026.

The Miwok 100K on May 2, 2026 in Stinson Beach CA is a rugged trail ultramarathon about 62 miles with roughly 11,000 feet of climbing. Run through redwoods, ridgelines and coastal cliffs with vistas of the Golden Gate Bridge and Point Reyes..