Fossil Butte National Monument

Fossil Butte National Monument is a United States national monument in Southwest Wyoming.

Understand
Fossil Butte National Monument is a unique paleontological site, where ecosystems of the 50-million-year-old Green River Formation of the ancient subtropical lake bed were unusually well preserved. The fossils include fish, alligators, bats, turtles, dog-sized horses, insects, and many other species of plants and animals.

Climate
Expect a variety of weather conditions no matter what time of year you visit. Spring, fall and winter can be very cold; expect snow and winter conditions.
 * Spring: Day time temperatures usually range from
 * Summer: Day time temperatures range from
 * Fall/autumn: Day time temperatures range from
 * Winter: Day time temperatures range from.

Visitor information

 * Park website

Get in
The visitor center can be reached along U.S. Highway 30 about 15 miles west of Kemmerer.

Fees and permits
There is no fee to enter the monument. Donations are welcome.

Do

 * Hike the 2½-mile Historic Quarry Trail or the 1½-mile Nature Trail
 * Have a snack in the picnic area
 * Have a snack in the picnic area