Can I use my annual pass?

Yes

If your annual pass was issued by the CSKT Bison Range Visitor Center, it is good for the year it was issued. As of 2020, Federal park passes are no longer accepted at the Bison Range. Visitors must purchase a day pass or an annual pass for all areas of the refuge, including the day-use area. Proceeds from these passes directly go to supporting the Bison Range, as it is no longer receives federal funds. For more information, please contact our Visitors Center.