Logo

Lake Sonoma 100 Miler

Geyserville, United States • 1 Feb 2025

The Lake Sonoma 100 Miler is an exciting endurance running event set in Geyserville, California, featuring a challenging 100-mile course with approximately 27,000 feet of elevation gain. The race emphasizes a festival-like atmosphere, complete with live music, food trucks, and wine tasting at the start/finish area. Participants can also enjoy a unique "Little Baby" backyard run. The event prioritizes runner experience with generous cutoff times, excellent aid stations, and a focus on community engagement, including charity support for the Children of Vineyard Workers Scholarship Fund. The race is designed to be memorable, whether runners face sunny or muddy conditions. Visit the organization's website for the most recent information.

United States California Geyserville

Race information

Website Registration
100 mi
27000 m+
100 Miler
100 mi
27000 m+
100m 4 Person Relay
50 mi
50m 4 Person Relay
Baby Backyard
Visit the organization's website for the most recent information.
Trail runs nearby

Lake Sonoma 100K / 55K

Lake Sonoma - 10 mi from Geyserville

The Lake Sonoma 100K and 55K, also known as the California Fall Classic, is a challenging ultramarathon held at Lake Sonoma, California, set amidst the scenic wine country during harvest season. The event features two distances—100 kilometers and 55 kilometers—on demanding courses that traverse mile..

California Fall Classic at Lake Sonoma

Healdsburg - 6 mi from Geyserville

The California Fall Classic at Lake Sonoma, held in Healdsburg, CA, offers two challenging ultramarathon distances: 100K and 55K. Set amidst the scenic wine country during harvest season, the courses feature relentless single-track trails with stunning views of Lake Sonoma. The 100K serves as a West..

Napa Fall Wine Country Marathon

Calistoga - 19 mi from Geyserville

The Napa Fall Wine Country Marathon will take place in Calistoga on Saturday 25 October 2025. You can run between 10 and 26 miles.

Napa Valley Trail Marathon

Calistoga - 19 mi from Geyserville

The Napa Valley Trail Marathon will take place in Calistoga on Saturday 21 March 2026. You can run between 10 and 26 miles.

Lake Sonoma 50

Healdsburg - 6 mi from Geyserville

The Lake Sonoma 50 is a premier trail running event held in Healdsburg, California, featuring a 50-mile ultramarathon, a marathon, and the Trail Sisters Half Marathon. Set against the scenic backdrop of Lake Sonoma, the races offer challenging courses through beautiful natural terrain. The event fos..

Napa Valley Endurance Run

Calistoga - 19 mi from Geyserville

The Napa Valley Endurance Run is a challenging trail running event held in Calistoga, California, featuring four race distances: 50k, 35k, half-marathon, and 10k. Starting and finishing at the Calistoga Fairgrounds, the courses traverse scenic Robert Louis Stevenson State Park and ascend to the top..