Sloan's Lake has been our top choice for the best trail before, but its combination of urban and mountain scenery and the breeze that's usually coming off this pretty lake is worth another shout-out. You get the Denver skyline for half of the 2.6-mile loop around the lake, and the Front Range on the other half. Because the trail and the surrounding grassy park are as flat as your arches (it gains only 17.71 vertical feet), it's a popular pick for intervals — not to mention that the path is plenty wide enough for dogs, strollers and cyclists. Once you finish, celebrate with a picnic and people-watching, or head across Sheridan Boulevard to one of the many hip eateries in Edgewater.