Truly one of America's iconic landscapes, Yosemite is big enough to make your running experience whatever you want it to be. There are easy trails in Yosemite Valley and challenging trails in the High Sierras. In all, there are 750 miles of trails in the park, visiting places like Hetch Hetchy, the Mariposa Grove of giant sequoias, the park's iconic waterfalls, and more. Says Rodriguez: "You can either go tough and super challenging, or extremely flat and easy. It's a great place if you want to be in nature, but not too far from the amenities in the valley."