Royal Gorge Six & Twelve
📍 Colorado, United States
mtbBeginner friendly
Date
15 May 2027
Distance
10 mile loop
Elevation
2,527 m
Difficulty
mtbbeginner friendly
Old Tucson 10er
Arizona, United States · 16–18 January 2027
Difficulty: 3/5 — Hard
A 10-hour lap-based mountain bike endurance race set on fast singletrack through the Sonoran Desert around historic Old Tucson Studios.
Visit official site →- Distances
- 10 hours
- Surface
- singletrack
- Typical W/kg
- 2.5–3.8
Rider fit
Who it's for
Solo riders, duos, and teams looking for a festive, endurance-focused mountain bike challenge over a 10-hour duration.
Who will struggle
Riders unprepared for sustained efforts and fast technical singletrack over many hours in dry desert conditions.
Training focus
Build cardiovascular endurance for long hours in the saddle combined with high-cadence speed on fast singletrack.
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 is the format of the Old Tucson 10er?+
It is a lap-based endurance race where solos, duos, and teams compete to complete as many laps as possible within a 10-hour timeframe from sunrise to sunset.
Where does the race take place?+
The event is hosted at historic Old Tucson Studios in Arizona, utilizing the surrounding singletrack of Tucson Mountain Park.
What categories are available for registration?+
Categories include various solo divisions (Open, 40+, 50+, 60+, Single Speed, Non-binary, Junior), duos (Female, Male, Coed, Junior, Adult/Junior), and teams of 3 or 4.
What is the policy on refunds and transfers?+
There is a strict no-refund policy, but registrations can be transferred to another race or deferred at least 30 days prior, or transferred to another rider via BikeReg at least 14 days prior for a fee.