DateExpected
Mid March 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Lake Sonoma, South Vista overlook, Geyserville, California
Geyserville, Sonoma County
Countdown
March
The long loop of a race that has run since 2013. 46 km with 1,372 m of climbing is a solid but fair day on the bike, one lap and done.
Key facts
01No licence needed to enter
02E-bikes must register in the E-Bike category
03E-bikes start first, ahead of the age-group and Pro waves
Create a free training plan for the Lake Sonoma MTB 46 km
7-day free trial, no card required
The course
The route
Geyserville
Distance46km
Total climb1,372m
StartElevation
0 kmDrag map to rotate40.7 km
Weather
Mid-March, Geyserville
14°CTypical high
7°CTypical low
2°CColdest in 20 years
36%Days with rain
Highs around 14°C and lows around 7°C, but it has dropped to 2°C. Rain on 36% of days.
NASA POWER data, 2006-2025, the week either side of race day
Results
Course verified. Results not yet available.
Organiser
OrganiserHopper Adventures (Grasshopper Adventure Series)
Instagram@grasshopperadventureseries
Running since2013
Training
Training for the Lake Sonoma MTB 46 km
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Lake Sonoma MTB 46 km plan targets
Typical sessions
46 km with 1,372 m of climbing
Endurance and fatigue resistance over the full distance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long endurance rides building toward the full distance
Threshold and sweet-spot work for sustained power
Terrain and skills practice specific to the course
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Lake Sonoma MTB 46 km plan.
7-day free trial, no card required.
Other races at Lake Sonoma MTB
More events in March in United States
Queeny Backyard UltraFri, 5 Mar 2027 · Manchester→The Sonoran Ultra-Endurance Ride (SAUER)Fri, 5 Mar 2027 · Tucson→Valley of Tears GravelFri, 5 Mar 2027 · Turkey→Belgian Waffle Ride ArizonaSat, 6 Mar 2027 · Cave Creek→Belgian Waffle Ride ArizonaSat, 6 Mar 2027 · Cave Creek→Come And Grind ItExpected Early March 2027 · Leesville→
