Sheepeater Cliff Trail is a 0.8 mile moderately trafficked out and back trail located near Yellowstone National Park, WY that features a river. The trail is rated as moderate and primarily used for hiking and fishing.
I did this trail a few years back, You can drive and park near a section of the cliff and climb around it if you want. My main purpose was to fish the Gardiner River, which is a decent trout stream. After descending or by passing the cliff formation, follow the dirt trail along the river. You will reach a cut-off near the rapids where you will stop or wade on to the other side. Not much shade here, so if you're out exploring, hat and water are needed..