Operating Hours & Seasons

A sign that says Fossil Butte National Monument with an image of a fish fossil and the NPS arrowhead.  Snow and some sagebrush surround the sign and there is a bright blue sky above.
The park is open year-round, but hours and accessible areas depend on the season.

NPS Photo

Visitor Center Hours

The Visitor Center is open year-round, but hours vary depending on the season.

  • Spring: May 1 - Memorial Day, daily 8:00 am - 4:30 pm
  • Summer: Memorial Day - Labor Day daily 8:00 am - 5:30 pm
  • Fall: Labor Day - October 31, daily 8:00 am - 4:30 pm
  • Winter: November 1 - April 30, Mondays - Saturdays 8:00 am - 4:30 pm, closed on Sundays and holidays: Veterans Day, Thanksgiving Day, Christmas Day, New Year's Day, MLK Day, and President's Day

To view prepared fossils on exhibit, the best place to look is our Visitor Center. As most fossils are trapped within horizontal layers of rock, they must be split and prepared before you can view the diversity and abundance of fossils found in this area.

Seasonal Closures

The entrance road gate is closed only during severe winter storms. The scenic drive with access to the picnic area and Nature Trail is closed from November until late May (weather-dependent).

Last updated: March 3, 2021

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Contact Info

Mailing Address:

P.O. Box 592
Kemmerer , WY 83101


307 877-4455

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