Fossil Butte National Monument
contains several square miles of sagebrush-covered hills and valleys in a sparsely settled region of southwest Wyoming, along US 30 between Kemmerer and Bear Lake, Utah. There are two locations of specific interest - an old cabin close to a disused fossil quarry (both along a 2.5 mile trail), and a 1.5 mile path to an active fossil excavation area, which is viewable close up only when a ranger is present. For people not hiking, the only activities are driving the short park road to a high overlook, and touring the exhibits in the museum at the visitor center.
Fossil Butte - full description