Flagstaff Loop Trail

OCT
10
2026
An informal, no-fee 45 mile loop around Flagstaff that requires self-navigation with a GPX file. Participants must bring assigned food or drink contributions and be prepared to carry most of their own supplies.
Sat 10 Oct 2026
45 miles

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Flagstaff Loop Trail 45 Miler

This is an unofficial "fatass" style, no-entry-fee running event on the Flagstaff Loop Trail. Because there is no entry fee, resources are limited and all participants must bring an assigned contribution such as cookies, chips, or sports drink for the shared aid supplies. Contributions are assigned and communicated before the event. Runners are encouraged to carry most of their own food and fluids.

The course starts and finishes at Schultz Creek Trailhead in Flagstaff, AZ. The loop is roughly 45 miles and the trail system is still evolving, so actual race-day distance may vary by about a mile. Total elevation gain is approximately 3,300 feet. The course is unmarked; participants must use a device capable of loading a GPX file for navigation.

Aid stations will offer water and the participant-contributed items. This is a cupless event; participants should bring a soft flask or soft cup if they plan to use aid station liquids.

One drop bag is available at the Lake Mary / JW Powell aid station (about mile 29). Drop bags will be returned to the finish line. Labeling is optional but may help with organization.

There are no formal cutoffs, but the organizer requests that runners who have not reached Woody Mountain Road (mile 35) by sundown consider stopping; transport back to the start will be provided if needed. Recommended gear includes a headlamp, enough food and water for the longest 12 mile segment, and clothing for variable October weather. Visit the organization's website for the most recent information.

45 mi
45 Miler

Events nearby

A historic Flagstaff race on August 8 with half marathon, 5K and Kid's Dash options on Observatory Mesa. Proceeds support Big Brothers Big Sisters of Flagstaff and participants receive shirts, photos and medals.
A USATF MUT sanctioned uphill race at Arizona Snowbowl covering about 11 miles of ascent to the summit, limited to 150 runners with on course aid stations and summit awards.
Trail running at Fort Valley Trailhead in Flagstaff with 6K–50K loop options through aspens and pines, aid stations no more than 7 miles apart.
Endurance races from Flagstaff to the Grand Canyon with 100 mile and 55K runs, a 100 mile mountain bike race, and relay options along the Arizona Trail.
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