Buckley Gate Hours The Buckley Visitor's Center is open weekdays from 6 a.m. to 2 p.m. by appointment only and is located at the 6th Avenue Gate. Call 720-847-9381 to schedule an appointment for a pass. The Mississippi gate is open 24 hours a day, seven days a week and can issue a pass in the event the Visitor's Center is closed. The 6th Avenue gate is open weekdays from 6 a.m. to 6 p.m. Buckley Garrison down days, holidays, and drill weekends may impact hours of operations. The Telluride gate is closed until further notice.