National Park of American Samoa
Dry season, from June to September. It's the best time for hiking and snorkeling.
Guide · 7 parks
Summer National Parks Without the Crowds
Summer is peak season almost everywhere. These parks are at their best in summer but stay manageable.
Gates of the Arctic
The visitor season: river trips and backpacking under the midnight sun. Mosquitoes peak in July.
Lake Clark
Bear viewing at Chinitna Bay and Silver Salmon Creek, plus fishing and paddling.
Wrangell–St. Elias
Prime time for Kennecott tours, glacier hikes and flightseeing.
North Cascades
The best and busiest time, though 'busy' here is quiet by national park standards. Trails clear in July and Diablo Lake glows turquoise from glacial flour.
Isle Royale
The main season for backpacking and paddling. Lake Superior keeps temperatures cool.
Katmai
July is the peak at Brooks Falls, when bears gather to catch leaping sockeye salmon. It's also the busiest time.
When to go
More guides
Warm National Parks to Visit in WinterBest National Parks for Fall ColorLeast Crowded National ParksBest National Parks for WildlifeBest National Parks for StargazingBest National Parks for FamiliesNational Parks with BeachesNational Parks with CavesNational Parks with VolcanoesBest National Parks for HikingThe Most Remote National ParksNational Parks with the Best Scenic DrivesNational Parks to Visit in the Snow
Last reviewed October 4, 2026. Ratings are editorial. Rules and road openings change each year, so confirm on the official NPS site before you go.