One of the world’s oldest national parks, Mount Rainier became part of the federal ... When to go: Year-round. Wildflowers are at their best in July and August. High trails may remain snow ...

But some of America’s most popular parks also require reservations, particularly during their busy season: summer.  ...

For a gorgeous spring hike where you can get sweeping views of wildflower-covered hills and a river below, head to this steep ...