America’s (and Canada’s) national parks hold some of the most spectacular country on earth — and the difference between a great trip and a frustrating one usually comes down to knowing where to go and when. These guides cut through the crowds: for each park we cover the must-see icons you shouldn’t skip, the best-kept secrets that locals and rangers love, the wildlife and safety you need to know, and the best time to visit.

Pick a park below to start planning — and check back often, because we’re always adding new ones.

9 park guides & growing