Royal Arch Trail

activities / Hiking & trekking

Lonely Planet review

Challenging but not excruciating, this roughly two-hour, 3.6-mile, well-signed trail leads you up along the Flatirons, through a vaguely red-rock canyon, then through a keyhole and up to a wonderful natural rock arch where you’ll perch on boulders, gaze at the Boulder basin and, on clear days, glimpse the Denver skyline. Grab a trail map at the park office before hiking.