Trail Running calendar near Lafayette 2025-2026

Join the Diablo Trails Challenge on April 4, 2026 at Mount Diablo with distances from 5K to 50K on scenic but demanding trails. A portion of entry fees benefits Save Mount Diablo and race day photos and a BBQ add to the experience.

Run the classic American River Endurance Runs from Folsom to Auburn, featuring 50 mile, 25 mile and 10 mile trail races that finish at the Auburn Overlook. Scenic river corridor, on course support, and a festive post race atmosphere.

Run Angel Island on a scenic hilly loop with sweeping Golden Gate, Alcatraz and Bay views. Choose a 10K or a half that circles the island twice at the 35th annual event limited to 400 runners, ferry included.

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.

Join the SPASM Lake Chabot Trail Run on April 11 for scenic loops around Lake Chabot with distances from 8K to 50K for every level. Enjoy rolling hills, color coded trails, tech shirts for pre registered runners and custom finisher medals.

Scenic trail run above Calistoga with 50K, 35K, half and 10K options that climb toward Mount St Helena. Start and finish on the Great Lawn at Calistoga Fairgrounds, and all finishers take home a custom medal and race shirt.

Enjoy springtime trails at Del Valle Regional Park with the Badger Cove Half Marathon, 10K, 5K or remote option on April 18, 2026. Scenic lake routes, chip timing, finisher medal and tee make it a great day for runners and walkers.

Run the scenic Horseshoe Lake Trail Run at Skyline Ridge in La Honda on April 18, 2026, with distances from 5 mile to 50K and a free kids dash. Expect rolling ridge single track, aid stations, and a friendly festival atmosphere.

Run scenic trails around Annadel State Park in a community fundraiser with a half marathon, 10K and 5K. Celebrate Earth Day with cup free aid stations and help support Trione Annadel State Park and Sonoma County Parks Foundation.

Take on San Carlos trails at No Foolin' Foot Race on April 18 at Crestview Park, with courses from a kids 1K to a long course with big climbs. Enjoy a festival finish, pro timing, tech shirts and photos while helping maintain local trails.

Run the scenic 38th Mt Tam Wild Boar at Mt Tamalpais State Park on April 25 2026, choose the half marathon or 10K, and enjoy coastal ridge views and single track trails. Field limited to 300 so register early.

Tackle the iconic Miwok 100K through the Marin Headlands on May 2, 2026, where redwoods, ridgelines, and coastal views await. Limited to 400 runners, this supported trail ultramarathon blends rugged challenge with community and sustainabili..

Join Tails & Trails on May 3, 2026 in Windsor CA to support Dogwood Animal Rescue with a fun 5K, Dogwood Dash, or virtual option. Bring your pup for a dog friendly run and help animals in need.

Run from Stinson Beach into the towering redwoods of Muir Woods on a scenic, rugged trail with ladders, stairs and scrambling sections for an adventurous challenge. Limited to 300 runners, this intimate race on May 9 2026 offers marathon, h..

Run scenic single track and dirt roads around Lake Anza in Tilden Regional Park, Berkeley, with distances from a family friendly kids dash to a tough 50K. Pre registered runners get shirts, all finishers earn custom medals and aid stations..

Trailquake 2026 in Saratoga on May 10 delivers scenic, climbing single track trails with half marathon, 10K and 5K options for runners and walkers of all abilities. Presented by Brazen Racing with shirts and awards for finishers.

Explore Napa's Skyline Wilderness Park on May 16 with 50K, 30K, half marathon and 10K trail runs through rim rock climbs and panoramic views of Mount Diablo, Mount Tam and Mount Saint Helena. Aid stations and on course support keep you movi..

Celebrate the 15th anniversary of Run for Amma, a charity trail run at Skyline Ridge supporting UCSF cancer research. Choose from challenging 50K and 30K routes or a scenic 10K, and enjoy community support from volunteers and local clubs.

Rimrock 50 Mile Trail Challenge in Napa invites solo runners and two person relay teams to tackle two scenic loops through Skyline Wilderness Park and nearby preserves. Expect staffed aid stations, on site camping, and hearty post race food..

Wildcat 2026 on May 16 in El Sobrante offers scenic 360 degree views of the Bay Area with race choices from 5K to half marathon or a remote option. Join the fun and help support the East Bay Regional Parks Campership Program.