Date
Sat, 10 Apr 2027
Start
10:00
Venue
Jackson State Demonstration Forest, Caspar, California
Caspar, Mendocino County
Countdown
April
One 32-mile gravel loop through Jackson Forest, and everyone rides the same course. About 1,260 m of climbing over 51 km is a solid day out, not a monster.
Key facts
01No licence required, so it's open to any rider
02E-bikes are not permitted
03One lap only, same course for every rider
Create a free training plan for the Jackson Forest: Grasshopper #4
7-day free trial, no card required
The course
The route
Caspar
Distance52km
Total climb1,261m
StartElevation
0 kmDrag map to rotate49.7 km
Weather
Early-April, Caspar
13°CTypical high
7°CTypical low
2°CColdest in 20 years
32%Days with rain
Highs around 13°C and lows around 7°C, but it has dropped to 2°C. Rain on 32% of days.
NASA POWER data, 2006-2025, the week either side of race day
2019 results
Who finishes, and how
#RiderTimeAvg speed
01Peter Lucas04:32:37.011.3 km/h
02Jonathan Baker04:35:55.911.2 km/h
03Christopher Coble04:38:09.311.1 km/h
104
Finishers
6:12:15
Median time
8.3 km/h
Median speed
Overall · 2019 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
OrganiserGrasshopper Adventure Series
Instagram@grasshopperadventureseries
Training
Training for the Jackson Forest: Grasshopper #4
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 Jackson Forest: Grasshopper #4 plan targets
Typical sessions
52 km with 1,261 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
Group rides for drafting and bunch-riding skills
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 Jackson Forest: Grasshopper #4 plan.
7-day free trial, no card required.
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