Bighorn Trail Run course maps and aid stations

You start at 9 AM Friday on Tongue Canyon Road, and the first big climb, hot and exposed, takes you out of the canyon to Horse Creek Ridge around mile 7.5. Red-dirt jeep trail through meadows takes you from Dry Fork past Kern's Cow Camp, the bacon station, then a steep, muddy drop puts you at Sally's Footbridge on the Little Bighorn River at mile 30. From there it's 18 miles and about 4,200 feet of climbing to the turnaround at Jaws. The organizer adds reflective tape and glow sticks to the flagging from Kern's Cow Camp to Jaws for the night.

You come back on the same trail, and the climb from Sally's back up to Dry Fork is long and steep. After the Tongue River Trailhead the last five miles are gravel road into Dayton. The organizer gives the mix as 76 miles of single-track, 16 of jeep trail and 8 of gravel road. Pacers can join from Sally's on the way out.

The 52 starts at Jaws at 5 AM Saturday and follows the 100's return leg. The first 18 miles drop through the Willow Creek, Duncum Creek and Wagon Box drainages to Sally's Footbridge, where you have to leave by 10 AM. The organizer suggests dry socks and shoes in your drop bag there. On the first 8 miles to Spring Marsh there's water, but you filter it yourself.

Then comes the big climb, up past Bear Camp and Kern's Cow Camp to Dry Fork and on to Camp Creek Ridge at 8,100 feet: about 3,500 feet over 16 miles. The organizer puts the whole course at roughly 9,000 feet up and 9,000 down. It doesn't set a time limit in hours: the finish closes at 8 PM, 15 hours after you start.

The 32 starts just above the Dry Fork aid station at 8 AM Saturday and climbs about 500 feet on a four-wheel drive road to the ridge, with open views on the way to Riley Point. Around mile 6 it drops steeply into Miller Creek to reach Kern's Cow Camp at mile 8.5, where it joins the 52, then climbs gradually for 6 miles back to Dry Fork.

From Dry Fork it follows the 18 mile course over Camp Creek Ridge and Horse Creek Ridge and down into Tongue River Canyon. The organizer says the distances on this course are estimates. Your time runs out when the finish closes at 8 PM, 12 hours after the start, since the organizer doesn't give a limit in hours.

The 18 starts at Dry Fork at 10 AM Saturday and goes up Freeze Out Road to Camp Creek Ridge at 8,100 feet, then down Sheep Creek on a four-wheel drive road to Upper Sheep Creek at about mile 5. After Horse Creek Ridge it drops into Tongue River Canyon, through wildflowers. Fill your bottles at Lower Sheep Creek, since the canyon below can be hot.

From the Tongue River Trailhead it's flat gravel road for the rest of the way. You cross the Tongue River on a footbridge, cross Highway 14 and finish in Scott Park. The 18 mile sold out in 2026. The organizer doesn't give a time limit in hours, so yours is the 8 PM finish cutoff, 10 hours after the start.