GRINDURO! Race Information
GRINDURO! California is September 13th, 2025
55 miles of dirt road and singletrack with 7,800 feet of climbing and four timed sections: Tear Drops gravel climb, Rouler’s Revenge rolling dirt, Grizzly Plunge gravel descent, and Smokechaser singletrack descent. There are no bike requirements; choose your wheels wisely! The race is not based on overall time, but the sum total of the timed stages. Racers only need to make the cutoffs for each stage.
Race Maps
Stage 1, Tear Drops
1.7 miles, 468 feet of gain. 9 AM CUTOFF.
Right out of the gates is the timed climbing stage, Tear Drops. 1.7 miles in length, the first mile is stiff and punchy grind-it-out gravel. The rest is you pushing your limits!
Stage 2, Rouler’s Revenge
2.8 Miles, 205 feet of gain, 236 feet of descent. 10 AM CUTOFF.
Rolling dirt road with beautiful views!
Stage 3, Grizzly Plunge
5.4 Miles, 1,568 feet of descent. 12:30 PM CUTOFF.
A consistent, high speed dirt road descent on Grizzly Ridge with expansive Lost Sierra views.
Smokechaser, 3.4 Miles
1,671 feet of descent. 4 PM CUTOFF.
The singletrack stage! Classic flowy Mt. Hough singletrack, a throwback to the original Grinduro!
The Grindurito
Not up for the full Grinduro? Then Grindurito is for you! A fun ride at only 27 miles and 3,197 feet of climbing, Grindurito still has 3 of the 4 timed stages. No podiums, just bragging rights.
Grindurito Course Map
Grinduro Start Time
8AM - non-compeitive rollout to stage 1.
Grinduro Categories
- Pro Men
- Pro Women
- Junior Men 13-18
- Men 30 & Under
- Men 31-40
- Men 41-50
- Men 51+
- Junior Women 13-18
- Women 30 & Under
- Women 31-40
- Women 41-50
- Women 51+
- Singlespeed open ages
Grindurito Categories
- Grindurito is a fun ride, so there are no podium awards. Instead, one randomly drawn male and female will each receive a prize package.
Grinduro Aid Stations
- Aid #1: Mile 8.5
- Aid #2: Mile 20.8
- Aid #3: Mile 29
- Aid #4/Lunch: Mile 33.2
- Aid #5: Mile 40.8
Grindurito Aid Stations
- Aid #1: Mile 8.5
- Aid #3: Mile 14.7
- Aid #4/Lunch: Mile 19
Important Information
- Mountains to Meadows Endurofest Event Schedule
- Plumas Sierra County Fairgrounds Venue Map
- Parking is available on the south side of the fairgrounds in a large lot near the fairgrounds entrance.
Overflow parking may utilize Fairgrounds Road and Highway 70
