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

California Fall Classic at Lake Sonoma

Healdsburg - 6 mi from Geyserville

Event overview The California Fall Classic at Lake Sonoma is a trail ultramarathon held at Lake Sonoma near Healdsburg, California on October 18, 2025. The event offers two distances: 100K 55K The 100K is a Western States Endurance Run qu..

Lake Sonoma 100K / 55K

Lake Sonoma - 10 mi from Geyserville

The California Fall Classic at Lake Sonoma offers challenging 100K and 55K ultramarathon races set in the scenic wine country of Lake Sonoma, California. Known for its relentless courses featuring miles of single-track trails with stunning..

Napa Fall Wine Country Marathon

Calistoga - 19 mi from Geyserville

Event details The 2025 Napa Fall Wine Country race is the 33rd annual trail event at Bothe-Napa Valley State Park in Saint Helena, California. It is scheduled for October 25, 2025 and is limited to 300 participants. Distances offered: Mara..

Napa Valley Trail Marathon

Calistoga - 19 mi from Geyserville

Event overview The Napa Valley Trail event takes place on Saturday, March 21, 2026, at Bothe-Napa Valley State Park in Saint Helena, California. The race is limited to 300 participants. Distances offered: Marathon Half Marathon 10K The ev..

Lake Sonoma 50

Healdsburg - 6 mi from Geyserville

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 w..

Napa Valley Endurance Run

Calistoga - 19 mi from Geyserville

Explore Napa's wild side on scenic single track and fire roads around Mount St Helena, starting and finishing at the Calistoga Fairgrounds Great Lawn. Choose from 10K to 50K distances, with UTMB Index status for select races.

UTMB Index