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Grasshopper Adventure Series: Lake Sonoma MTB
Event 3 of 5Grasshopper Adventure Series

March 22, 2025

Grasshopper Adventure Series: Lake Sonoma MTB

Lake Sonoma, USA · Grasshopper Adventure Series

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15 mi28 mi

About this event

The Lake Sonoma MTB Grasshopper is a thrilling mountain bike race that challenges riders with some of the most technical, flowy singletrack in Northern California. Set in the rugged landscape around Lake Sonoma, this 27-mile loop course features steep climbs, fast descents, and over 4,000ft of climbing—with no easy way out. Offering both a full and short course, it’s a demanding yet rewarding experience that brings together mountain bikers of all levels for an unforgettable day on the trails.

Photos

Routes

Lake Sonoma MTB Short Course

15 mi · ↗ 2,533 ft · 80% gravel · $130 entry

A shorter course option north of Rockpile Rd offers a more accessible alternative, sharing the same finish as the long course.
Route details ↗

Lake Sonoma MTB Long Course

28 mi · ↗ 4,304 ft · 90% gravel · $130 entry

The Lake Sonoma MTB long loop is back, featuring Northern California’s toughest, flowy single track. After recent impassable years, a bridge at Rancheria Creek will be set up by Healdsburg Running Co. and Friends of Lake Sonoma to ensure access in case of high water.

Starting from the South Vista overlook and following a clockwise route, the trail demands constant climbing and descending, modeled after the Tevis Cup horse race trail. With over 4,000 feet of climbing across 27 miles—and no bailout points—this challenging loop isn't for everyone. A shorter course option north of Rockpile Rd offers a more accessible alternative, sharing the same finish as the long course.
Route details ↗

Volunteer info

Contact iain@grasshopperadventureseries.com

Lodging

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Event details are provided by the organizer. Gravel Calendar LLC is not responsible for their accuracy. Please participate at your own risk.

Registration

Opens
December 26, 2024
On-site registration
Yes

Event organizer

Grasshopper Adventure Series

Grasshopper Adventure Series Dive into the world of unconventional, grassroots bike racing, where adventure knows no bounds. The Grasshopper Adventure Series (AKA “Hoppers”) is the world’s first and longest-running gravel/mixed-terrain adventure series, created to push riders to the limit without pushing them over. Held monthly from January through May, come experience the thrill of exploration, camaraderie and raw beauty in Northern California’s hidden landscapes. Join for a single event or lock into the full series.

https://www.grasshopperadventureseries.com/

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