Overview
Tensleep Canyon is the geological showpiece of Bighorn National Forest's western approach. US-16 follows Tensleep Creek through the canyon, and the trail system allows hikers to leave the road and walk the creek corridor through a limestone landscape that reveals hundreds of millions of years of Earth history in its color-banded walls.
The canyon takes its name from the Crow and Lakota Sioux practice of measuring distance in "sleeps" (days of travel), and this location was approximately ten days' travel from each of several neighboring tribal territories. That history adds a layer of context to what is already a striking physical environment. The limestone exposed in the canyon walls dates primarily to the Permian and Pennsylvanian periods, and the layered bands of red, gray, and tan visible throughout the canyon record cycles of ancient seas, reef environments, and tidal flats across roughly 300 million years.
The Route
Miles 0.0 to 0.5: Trailhead to Creek Level
The trail drops from the US-16 pullout to Tensleep Creek level and follows the water upstream. The canyon walls are immediately present, rising steeply from both banks and narrowing the sky to a long corridor overhead. The transition from highway pullout to creek-level canyon happens quickly, and within a few hundred yards the road noise fades behind you.
Miles 0.5 to 2.5: Canyon Traverse
The trail follows the creek through the narrower canyon sections, crossing back and forth as the terrain requires. Limestone walls in shades of red, tan, and gray rise above. Look for the distinct horizontal banding that marks shifts in the ancient depositional environment. The creek itself is cold, clear, and supporting of the native cutthroat trout fishery. American dippers work the fast water sections, and canyon wrens call from the cliff faces above. Rock climbing routes are visible on the faces to the north; Tensleep Canyon is well regarded in the climbing community for its overhanging limestone sport routes.
The trail is not formally maintained for its entire length and sections may require route-finding along the creek bank. Wear footwear you are comfortable getting wet.
Miles 2.5 to 5.0: Return
Return via the same creek route. The downstream direction moves faster, and the canyon light changes with the sun angle, making the return trip visually different from the outbound walk.
When to Hike
May through October is the accessible season. June and October can be muddy or cold but are workable with appropriate layers and waterproof footwear.
July through September is the most comfortable window. Creek levels are lower in late summer, making the crossing sections easier.
Winter: the canyon can be accessed but the creek trail may be icy near the water and in the shaded lower sections. Traction devices are worth packing for shoulder-season visits when overnight temperatures have recently dropped below freezing.
What to Bring
Many hikers carry 1.5 liters of water for this 5-mile route. The creek is present throughout but should be filtered before drinking. Waterproof shoes or quick-dry trail runners are more practical than standard hiking boots for the creek-level sections, where the trail occasionally crosses the water. A light jacket is worth carrying even in summer, as the canyon walls shade the route for much of the morning.
Trailhead Access
Multiple pullouts along US-16 in Tensleep Canyon provide access. The canyon runs for several miles and the pullouts are easy to spot from the road. No fee to park or hike (as of 2026). The Tensleep Canyon Campground sits within the canyon and is suitable for overnight stays if you want to extend your time in the area. Vault toilets are available at the campground.
Nearby
Solitude Loop provides a ridge-top alternative from the eastern approach, with a completely different character from this creek canyon experience. Hunter Corrals Trail accesses the wilderness lake country from the other side of the range and requires a longer drive via US-16 across the plateau.
Check road and trail conditions at checking conditions before you go. Practice Leave No Trace principles throughout.