Trail Running calendar near Lake Sonoma 2026-2027

Experience iconic San Francisco trails as Spartan Trail takes runners over the Golden Gate Bridge into the Marin Headlands. Distances from 15K to 50M make this coastal challenge a fitting finale for the Spartan Trail World Championship.

Run the stunning coastal trails around Rodeo Beach at the Golden Gate Trail Run, with distances from 8K to 50K to suit all levels. Expect rugged singletrack, stocked aid stations, generous finisher medals, and unforgettable views.

Tackle scenic, hilly trails on Angel Island in Tiburon with 5, 10, and 15 mile courses plus a free 50 yard kids run for ages 6 and under. Expect single track climbs, stunning views, ferry access, medals and stocked aid stations.

Run through iconic Marin Headlands, Mt Tamalpais and Muir Woods in this scenic trail ultramarathon with 50 Mile and 50K options showcasing coastal views and big climbs. Expect technical single track, steep climbs and unforgettable scenery.

Challenge yourself on the scenic, technical trails of China Camp State Park with 5K, 10K and Half Marathon options March 13 to 16, 2026. Live and virtual entries available with registration price rising after Dec 31, 2025.

Big Alta is a three day trail running festival in Marin County with summit routes and stunning San Francisco Bay views. Choose from 28K, 50K or a point to point 100K, all with live timing and stocked aid stations.

Run scenic single track trails, hills and streams at Bothe Napa Valley State Park in the intimate 300 runner Napa Valley Trail. Choose marathon, half marathon or 10K and get a race shirt plus finisher medals for full and half.

Join the Lag Bon 10K trail run in Fairfax on March 22 to celebrate World Water Day and support Evidence Action's Safe Water Now program. Limited to 100 runners, the technical 10K features stairs, roots and muddy singletrack and runs rain or..

Limited to 400 runners, the Golden Gate Headlands Marathon, Half Marathon and 10K invites trail lovers to Mill Valley, CA. Run single track trails and fire roads with sweeping views of the Golden Gate Bridge, San Francisco Bay and Pacific.

Romancing the Island at Angel Island State Park offers a scenic half marathon or 10K loop with iconic Bay views. Limited to 400 runners, this intimate island race is ferry accessible and unforgettable.

Run scenic Lake Sonoma trails near Healdsburg with a 100K Western States qualifier, a 50K, and a women only Trail Sisters half. Expect rolling singletrack, lake views, on course aid and a memorable finish with a custom bottle of wine.

Take on Calistoga's scenic mountain trails on April 12, 2026, with distances from a spirited 10k to an epic 50k. Expect rugged single track, sweeping views of Table Rock and Mount St Helena, aid stations on course, and a festive finish on t..

Run the Mendocino Coast 50K on April 18, 2026, and tackle scenic coastal trails, redwood groves, waterfalls, and ocean views. Finish on the bluffs above Mendocino Village for a breathtaking Pacific panorama.

Celebrate Earth Week with trail runs through Annadel State Park at Spring Lake Regional Park in Santa Rosa. This nonprofit fundraiser features half marathon, 10K and 5K distances, low waste aid stations, and supports local park stewardship.

Join the 38th Mt Tam Wild Boar Half Marathon and 10K on April 25, 2026 at Mt Tamalpais State Park for a scenic ridge and trail run with sweeping views of Bolinas Lagoon and the Pacific. Entry is limited to 300 runners for an intimate race d..

The Miwok 100K is a 62 mile trail ultramarathon through redwoods, exposed ridgelines and coastal cliffs in the Marin Headlands. It is a demanding, well marked race with relay entries and a strong commitment to sustainability.

Join Tails & Trails on May 3, 2026 for a fun charitable run and walk supporting Dogwood Animal Rescue. Choose the in person 5K Dogwood Dash or a virtual any distance and help animals while you enjoy the outdoors in Windsor, CA.

Hit the trails at Pacific Union College in Angwin on May 3 for Angwin to Angwish, with 26K, 10K and a 1 mile kids run. Scenic courses and a community vibe, with proceeds benefiting PUC Athletics.

Experience towering redwoods and coastal views at the 36th Stinson Beach Muir Woods Trail Run on May 9, 2026. Choose marathon, half, or 7 mile routes in an intimate field of 300 for a scenic, rugged adventure with T shirts and medals.

Join the Waves & Whales 5K in Point Arena for a scenic coastal loop along bluffs and forest. All ages welcome and proceeds benefit a youth conservation program, with participants receiving an organic cotton tee and snacks.