Thus far, seven national parks require reservations, whether that is for vehicle entry or hiking permission.

Seven national parks require reservations, whether that is for vehicle entry or hiking permission.

Acadia National Parkin Maine requires vehicle reservations between May 21 and Oct. 26.

A rocky coastline at Acadia National Park, Maine, featuring waves hitting the shore and a forest atop cliffs

Otter Cliff at sunrise in Acadia National Park.Credit:Dermot Conlan/Getty Images

Glacier National Park in Montana also requires timed entry reservations for vehicles, between June 13 and Sept. 28.

Hawaiis Haleakala National Park requires reservations for every vehicle year-round.

Rocky Mountain National Parkin Colorado requires a timed entry reservation between May 23 and Oct. 13.

Yosemite National Park anticipates sharing details about this year’s reservation system in the near future.

Reservations for national parks can be made onrecreation.gov.