In celebration of the signing of the Great American Outdoors Act in 2020, all National Park Service units (Parks, Monuments, Historic Sites) will be on Monday, August 4, 2025. This includes: entrance fees, commercial tour fees, and transportation entrance fees. The nearest to the metro area is splendid between Estes Park and Grand Lake.

Rocky Mountain National Park. Credit: NPS/M. Reed
IMPORTANT: You still MUST for RMNP. When you select August 4, it will note this is an “Entrance Fee Free Day” (though you still have to pay a $2 reservation fee.)
Reservations for August at RMNP opens on July 1. If all timeslots are booked, you can check back on August 3 at 7 p.m. MDT when the NPD releases more tickets.
Reservations are not required if you enter the park early in the morning (before 9 a.m.) or after 2 p.m.
Timed entry permits are required to enter the Bear Lake Road Corridor between the hours of 5 a.m. to 6 p.m.
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Before heading to any national park, monument or historic site, check its website first to learn its current entrance procedures, as many are operating with a similar reservation system.
Also, even though you get free entry, other fees such as reservation, camping, tours, concession and fees collected by third parties are not included.
National Parks – All Locations
CO