Trail Running calendar near Lake Sonoma 2025-2026

Run the festive Krampus Cross Country in San Francisco with live races on Dec 7 and a virtual option Dec 5 to Dec 8. Pick a 5K, 10K or the Naughty Nine Miler and score a woodallion, race shirt and Krampus beer sampler stein.

Peacock Gap Trail Run invites runners to China Camp State Park near Mt. Tam for 30K, half marathon and 10K distances on scenic single track and fire roads. Enjoy forested views, a challenging climb and hearty aid stations.

Take on San Francisco in the legendary Hunter S. Thompson Fear & Loathing, an annual urban ultramarathon starting and finishing at Twin Peaks with 50 mile and 50K distances. Community run with free entry, a casual fat ass vibe, scenic city..

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 trails along the Pacific and Marin Headlands with sweeping views of San Francisco and the Golden Gate Bridge. Distances range from 8K to 50K and include a free kids dash, making this a perfect coastal race for every runner.

Run scenic trails around Angel Island from a lively 5 mile loop to a challenging 15 mile climb up Mount Livermore, with custom medals and pre registered shirts. Ferries from Tiburon set the scene for a memorable island race day.

Run scenic trails at China Camp State Park in Santa Venetia with live and virtual 5K, 10K, and half marathon options on March 15, 2026. Expect technical single track, big climbs, and rewarding views for trail runners seeking a challenge.

Experience the Marin Ultra Challenge on March 14, 2026, a scenic yet demanding trail run through the Marin Headlands and Muir Woods with 50 Mile and 50K options showcasing coastal views, redwoods and technical single track. Limited to 450 r..

The Big Alta is a three day trail running festival in Marin County offering 28K, 50K and 100K routes that climb scenic ridgelines with sweeping San Francisco Bay views. Expect staffed aid, chip timing and lively post race vibes.

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 a scenic 10K trail at Lake Lagunitas with roots, bridges and about 400 feet of climbing while supporting Evidence Action's Safe Water Now program. Limited to 100 runners, rain or shine, so register early for this feel good challenge.

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 Lake Sonoma on April 11, 2026, with scenic singletrack options for 100K, 50K and the women only Trail Sisters half marathon. Challenging climbs, lakefront trails and great aid make this a must for trail runners and Western States hopefu..

Trail run Napa Valley from the Great Lawn at Calistoga Fairgrounds to Mount St. Helena and Oat Hill Mine, with 50K, 35K, half marathon and 10K options. Expect big climbs, scenic single track and rewarding winery views.

Run a scenic 50K along the Mendocino Coast from Big River State Beach to bluffs overlooking the Pacific at Mendocino Village. Trails wind through redwood forests, waterfalls and ocean vistas for an unforgettable coastal ultramarathon on Apr..

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.

Take on the Miwok 100K in the Marin Headlands near Stinson Beach, a scenic 62 mile trail with 11,000 feet of climbing. Limited to 400 runners, the well supported, low waste event offers relay and training options plus finisher swag.