Want to experience the best trails the National Park Service has to offer? Utah-based shoe company KURU said it used the total number of trails, distance of trails, average trail rating, number of annual visitors and acreage of the park to narrow down over 4,155 combined trails across 63 national parks. Yosemite ranked No. 1. It also made The Family Vacation Guide's best national parks for you and your family to visit this summer list and was one of the 25 most visited parks in the National Park System last year.