Boars Tusk is a 6 mile lightly trafficked loop trail located near Rock Springs, WY that offers the chance to see wildlife and is good for all skill levels. The trail is primarily used for hiking and trail running and is accessible year-round.
If you're traveling along I-80 and have 2 hours to spare I would recommend taking the time to drive North out of Rock Springs on state HWY191 towards this unusual formation. The trail that circumnavigates the formation is flat and easy to hike. Just make sure to have half a tank of gas and water.