18 Mile Course Description

The directions and distances are estimated. 

Course elevation at the start: 7480 feet.

The 18M course begins at the HEAD OF THE DRY FORK aid station and proceeds up the Freeze Out road, following trails and a gravel road cresting on Camp Creek Ridge at 8,100 feet. It then descends down Sheep Creek drainage to 7450 feet on a four-wheel drive road. At about 4 1/2 miles you will reach the fully supplied UPPER SHEEP CREEK aid station. Next is the summit of Horse Creek Ridge at 8,000 feet, following trails and primitive four-wheel drive roads, which will then drop you into Tongue River Canyon. Take a moment to view the canyon and the distant plains before you descend the trail through seas of wildflowers.

LOWER SHEEP CREEK aid station at mile 10 and 5025 feet, is a good place to fill your bottles before entering the sometimes hot canyon below. Continuing on to the TONGUE RIVER aid station at mile 12 1/2 and approximately 4240 feet you will leave the trail and run on a relatively flat gravel road for the remainder of the distance. At about mile 15 is the final aid station, HOMESTRETCH aid station. Continue on and just as you are entering Dayton you will cross the Tongue River on a rustic footbridge. Runners then cross Highway 14 and proceed into town making a left onto 3rd street. Go one block and make a left onto Broadway and into Scott Park where the FINISH and picnic gala await you.

Tongue River Trail

Tongue River Trail

18M Aid Stations

Additional Information

Bighorn Trail Run Aid Stations are famous in the Trail Running community. We are known for our extravagant aid station supplies! 

Upper Sheep Creek ~ 4:30PM Cutoff

Mile Elevation 7450'   Moderate Aid - Water,  hydration drink, soda, fresh fruit, potatoes, cookies, chips, pretzels, candy     

Lower Sheep Creek

Mile Elevation 5025'    Minimal Aid 

This is a HIKE IN aid station for Volunteers with all supplies backpacked in. Expect minimal supplies - water, pretzels, trail mix, granola bars...    

Tongue River Trailhead ~ 6:45PM Cutoff

Mile Elevation 4240'    Moderate Aid -

water, hydration drink, soda, fresh fruit, potatoes, cookies, chips, pretzels, candy   


Home Stretch

Mile Elevation 4040'   Minimal Aid - Water, hydration drink, soda, fresh fruit, potatoes, cookies, chips, pretzels, candy     


Mile 50 Elevation 3970'    Major Aid