Trail Running calendar near Lake Sonoma 2025-2026

2025 Hark the Herald Half Marathon & 10K, the 37th annual edition, takes place at Angel Island State Park, Belvedere Tiburon, California. The Half Marathon is two loops on a hilly trail; the 10K is a single loop. The event is limited to 400 participants, creating an intimate atmosphere with panorami..

Zoom Angel Island is a trail running event on Angel Island, accessible via chartered ferries from Tiburon, California, offering spectacular views of Marin County and San Francisco. Distances include 5 miles, 10 miles, 15 miles, plus a Kids Run (free). The hilly course circles the island and climbs M..

The Marin Ultra Challenge is Inside Trail Racing’s premier Marin County long-distance trail race, offering 50-mile and 50K options. The route starts at Rodeo Beach and loops through the Marin Headlands, Mt. Tamalpais, and Muir Woods, delivering coastal and inland vistas, varied terrain from exposed..

2026 Napa Valley Trail Marathon, Half Marathon & 10K takes place at Bothe-Napa Valley State Park in Saint Helena, California. The event offers three trail distances: marathon, half marathon, and 10K. Runners tackle lush single-track with hills, streams, and rocky sections; the course is marked with..

Set in the Marin Headlands, the Golden Gate Headlands Marathon, Half Marathon & 10K starts and finishes at the Historic Gunnery Range in Rodeo Valley, Mill Valley, California. The course traverses scenic single-track trails and fire roads, offering panoramic views of San Francisco Bay, the Golden Ga..

Taking place in Healdsburg, California, the TERREX Lake Sonoma weekend features three distances on April 11, 2026: the Lake Sonoma 50 Mile, the Lake Sonoma Marathon, and the Trail Sisters Half Marathon. The event blends competitive racing with a festival atmosphere, including an Elite division in th..

Romancing the Island Half Marathon & 10K takes place at Angel Island State Park, Belvedere Tiburon, California. The course is a hilly loop around the island: the half marathon runs the loop twice, the 10K once. Runners enjoy panoramic views of the Golden Gate Bridge, San Francisco, Alcatraz, the Eas..

Location: Calistoga, California, in Napa Valley. Distances: 50k, 35k, half marathon, and 10k. Atmosphere: a mountain-style trail ultra with a devoted community feel, starting and finishing on the Great Lawn at the Calistoga Fairgrounds.Course: four races depart the Fairgrounds, venturing into Robert..

The Mendocino Coast 50K is a trail run on Northern California’s Mendocino Coast. The course passes through coastal and forest terrain and includes a river, ocean views, redwood forest sections, and a waterfall. The race start location is Big River State Beach in Mendocino, California. News items l..

Mt Tam Wild Boar Half Marathon & 10K takes place in Mt Tamalpais State Park, Mill Valley, California. The coastal ridge course blends rolling single-track with paved sections, offering views of the Pacific Ocean, Bolinas Lagoon, and Marin County watershed. Runners traverse Ridgecrest Blvd along Boli..

The Miwok 100K ultramarathon is staged in Marin County, California, with the start/finish in the town of Stinson Beach, near San Francisco. The race covers 100 kilometers on single-track trails and dirt roads, featuring 11,800 feet of elevation gain, a cup-less policy since 2013. Runners are treated..

The Tails & Trails Charitable Walk/Run takes place in Windsor, California, at 11010 Estate Lane. This event offers a 5K run and a Dogwood Dash, with a virtual option allowing participants to complete any distance. The event supports a charitable cause and provides a welcoming atmosphere for runners..

The Waves & Whales 5K Trail Run is an annual event held on the Mendocino Coast in Point Arena, California. The scenic course starts behind City Hall in a conifer forest near Highway 1, follows coastal bluffs along the Point Arena-Stornetta Unit of the California Coastal National Monument, and loops..

The 2026 Stinson Beach/Muir Woods Marathon, Half Marathon & 7 Mile is a challenging trail event launching from Stinson Beach Park in California. Runners follow the Dipsea Trail into Muir Woods, ascending to Steep Ravine where a wooden ladder and natural stairways test movement among towering redwood..

Rim Rock 50 Mile Trail Challenge is the inaugural ultramarathon in Napa Valley, staged at Skyline Wilderness Park and weaving through the Napa Open Space Preserve and the new Suscol Headwaters Trail System. The event offers a 50-mile solo option or a two-person relay, with two roughly 26-mile loops..

Napa Wilderness Trail Runs, held at Skyline Wilderness Park (2201 Imola Ave, Napa, CA), offers a spectrum of trail races from a 10K up to a 50K. The event emphasizes accessibility for all levels, with a 50K and 30K designed with guidance from ultra runner Angela Abbey. The courses feature Rim Rock T..

Wildcat 2026, held at 3800 Clark Road in El Sobrante, California, offers a Half Marathon, 10K, and 5K. The page highlights spectacular 360-degree views of the Bay Area from the course. Specific route details aren’t described, but the event is run by Brazen Racing and takes place within East Bay Regi..

Sonoma Coast Trail Runs, presented by SkyBreaker Racing, takes place on the trails of Sonoma Coast State Park along Northern California’s coastline, just south of Jenner, Duncans Mills, and the Russian River. The event offers four distances: 50K, Trail Marathon, 30K, and Half Marathon, all run on ru..

Nitro Trail 2026 is a trail-running event held at Point Pinole Regional Shoreline Park, 5551 Giant Highway, San Pablo, California 94806. It offers three distances: a half marathon, 10K, and 5K, appealing to a range of runners and walkers. The event is branded with an energetic theme, described as an..