I've been to all 63 major US national parks. There are 5 I always tell people to visit in the summer.

I think Denali is one of the best US national parks to visit in the summer months. Emily Hart After visiting all 63 major US national parks , I think some are best experienced in the summer. Although certain parks are more crowded in the summer months, many are also much more accessible. Without snow coverage, parks like Kenai Fjords, Glacier, and Grand Teton are easier to explore. I would argue that there is no bad time of year to visit the US national parks . But after visiting all 63 of them, I've found that some particularly shine in the summer months. Although summer is peak vacation and road trip season — which can lead to crowding at some iconic landmarks within the national park system — there are plenty of reasons to explore the parks at this time of year, from better weather to more active wildlife.