Hell of Hunterdon
📍 New Jersey, United States
gravelroadBeginner friendly
Date
March 2027 (TBA)
Distance
29 miles · 55 miles · 81 miles
Elevation
1,768 m
Difficulty
gravelmtbbeginner friendly
Grinduro Pennsylvania
Pennsylvania, United States · 18 July 2026
Difficulty: 3/5 — Hard
A festive 79-mile off-road challenge in Sproul State Forest featuring 6,500 feet of elevation gain on mixed terrain. This event uniquely blends a relaxed social pace with four competitive, timed segments.
Visit official site →- Distances
- 42 miles · 79 miles
- Elevation
- 1,981 m
- Surface
- gravel, singletrack, tarmac, dirt
- Typical W/kg
- 2.5–3.8
Rider fit
Who it's for
Riders seeking a perfect balance of challenging off-road competition and a vibrant, music-filled festival weekend with friends.
Who will struggle
Strict pavement enthusiasts who lack the technical bike-handling skills needed for rocky singletracks and loose gravel descents.
Training focus
Build solid endurance to cover the 79-mile distance, combined with short, punchy anaerobic capacity efforts for the timed segments.
Are you ready for this race?
Compare your W/kg to see how you stack up against this race's typical level — and which races fit you best right now.
FAQs
What are the course distances available?+
Participants can choose between the full 79-mile Grinduro route with 6,500 feet of climbing, or the shorter 42-mile Grindurito route with 3,500 feet of climbing.
How does the timing and racing format work?+
The race utilizes an enduro format where only four specific segments of the route are timed. Outside of these segments, you can ride at a relaxed, social pace with other participants.
What type of bicycle is recommended?+
A gravel bike or a hardtail mountain bike equipped with climbing gears and tubeless tires of at least 40c width is highly recommended. Road bikes are not suitable for this terrain.
Are electric bikes allowed at the event?+
Yes, e-bikes are permitted, but they are strictly limited to the shorter 42-mile Grindurito course.
What lodging and camping options are available?+
On-site tent camping is offered at the Castanea Fire Company Picnic Grounds for ten dollars per person. Alternatively, riders can stay in local hotels, bed and breakfasts, or vacation rentals in nearby Lock Haven.