Flagstaff Extreme Adventure Course
Fort Tuthill County Park
Flagstaff, AZ 86001
Parking is $10 per vehicle, please carpool!
The cool pine forests at the historic Fort Tuthill County Park make the perfect spot for a mud run! Join us at the Flagstaff Extreme Adventure Course for summer Arizona temperatures in the 70s and race in Monsoon season with tons of mud!
*This is the starting price: competitive and early waves and longer course distances may be more. Prices do not include a mandatory $9.95 USOCR One Day Insurance Membership or a processing fee our registration partner charges.
Want to earn a free race? Volunteer with our crew for half of the day and race for free before or after working with us. Signup now to volunteer and join our team!
Terrain is about families and friends and working together to conquer this course.
Kids 7-13 years old must have a parent race with them on the 5k course and the parent will need to buy a regular 5k entry.
Even younger kids can compete on a half-mile course for ages 2-10 years old. One adult can run along the course to cheer their youngster on. You'll see several wave times available for the Mini Monkey race at each race we host.
Mini Monkey course: 2-10
5k with a parent: 7-13
Sign up before the price increases on March 26. We don't offer coupons, instead we simply offer the lowest pricing so EVERYONE saves!
Proceeds from Terrain Race: Flagstaff support several local organizations. We want the money you pay for this race to stay in the local community and help some great organizations.