IMTUF 100

Results: 2026

107 runners finished.

iRunFar's weekly roundup reports both winning times as course records on the Jug Mountain Ranch course used since 2020.

Source: UltraSignup — 2026 IMTUF 100 Miler results. Checked September 24, 2026.

Event Overview

A rugged mountain 100 from Jug Mountain Ranch near McCall, serving as both a Hardrock and Western States qualifier in 2026.

Course & Terrain

Mountain trail race starting and finishing at Jug Mountain Ranch south of McCall.

Key course features to know before comparing this race:

• Jughandle Mountain’s talus ridge and the view down to Louie Lake
• The Crestline Trail, with the goat-supplied 45th Parallel aid station and Box Pass at 8,000 ft
• Upper Payette Lake and the Twentymile Trail
• Snowslide Lake and Snowslide Summit
• Bugling bull elk during the late-September rut

The footing is rough throughout and brutal in places. From Jug Mountain Ranch (4,955 ft) the course climbs through Jug Meadows and over Jughandle Mountain, where about a quarter mile of steep talus near mile 9 is a mandatory walk-and-scramble zone, then passes Louie Lake and a 7,700-ft pass between Twin Peaks and Jughandle. The Fall Creek climb is steep and rocky before an ATV-trail descent to South Crestline. The Crestline section (miles 29.5–47) is the wildest: repeated steep climbs, granite slabs where the trail fades, and Box Pass at 8,000 ft. Later come chunky gravel roads, the rough 1.4-mile Terrible Terrence Trail, the Twentymile Trail, Snowslide Summit at just under 8,000 ft and a final climb past 8,300 ft before the descent to the ranch. The director marks the course in pink, with reflective markers at night and signs at nearly every junction; runners who see no marker should turn back.

The organizer’s advice is to expect anything. McCall is generally warm and stable in September, but frost at the 6 AM start is close to certain, and in calm weather the low canyons run colder than the ridges. In 2016 a storm arrived despite a 0% precipitation forecast and brought snow, rain and sleet all night. The race director considers heat the bigger threat, saying a hot day drives DNF rates higher than a winter storm. On race weekend in 2026, the sun set at 7:49 PM Saturday and rose at 7:28 AM Sunday.

Format & Support (as run)

Why This Race Matters

IMTUF, the Idaho Mountain Trail Ultra Festival, was first run on October 6, 2012, when 17 runners finished, and it has been a Hardrock qualifier since that first year. Jeremy Humphrey directs it with his wife, Brandi, marks the whole course himself and pitches it as a “post-doctoral” mountain race. Since 2020 it has used the Supercourse, a loop of about 100 miles from Jug Mountain Ranch through the Salmon River Mountains, with about 22,000 ft of climbing, a talus descent off Jughandle Mountain and a remote traverse of the Crestline Trail. Jason Schlarb (2020), Kaci Lickteig (2023) and three-time winner David Ayala are among its champions. In 2026, the 15th edition, Benjamin Stout and Ginny Robbins both set course records.

Historical benchmark notes in the directory record (verify current records with the linked official sources):

• Men: Benjamin Stout, 18:46:47, 2026
• Women: Ginny Robbins, 23:07:03, 2026
• Men, 2012–2019 course: David Ayala, 19:22:26, 2018
• Women, 2012–2019 course: Rachel Entrekin, 24:04:05, 2019

Preparing for a Race Like IMTUF 100

The 100-mile race guide covers the format as a whole. These guides go deeper:

• Walking strategy for ultramarathons: When and how to walk by terrain, effort and cutoffs.
• Crew and aid-station strategy: Crew tables, aid stops, drop bags and runner preferences.
• Gut training for ultrarunners: A six-week practice sequence for race-day fueling.
• Tapering for ultramarathons: Plan the taper and race week around your own recovery.

Best Fit

• Experienced mountain runners who want a Hardrock qualifier
• Runners comfortable with off-trail talus, route-finding and long remote sections
• Runners after a small, old-school race in the Idaho backcountry

Planning Notes

• Treat intermediate cutoff gates as part of the course. Build enough margin for aid stops and late-race slowdown, and verify every current gate in the official rules.
• Train for terrain-specific fatigue. Technical trails and mountain courses demand downhill durability, hiking efficiency, and reliable night lighting.
• The directory does not mark this as having simpler logistics. Confirm qualification, terrain, support, registration, medical, and withdrawal requirements before planning around it.

Event FAQs

Related Preparation

• Compare verified US 100-mile races
• Compare this race in the full 2026 calendar
• Open the 100-Mile format guide
• Open the Fixed-Distance format guide
• Compare all race formats
• Use the timed-race pace calculator
• Plan checkpoint arrivals and cutoff buffers
• Print a pace band for your goal time
• Estimate race calories and plan fueling
• Build a crew and drop-bag plan
• Build a race-specific gear checklist