Evan Quarnstrom In addition to Sanitas, the other must-visit hike in Boulder is the 3.3-mile climb to Royal Arch in Chautauqua Park. The trail has several uphill and downhill sections, climbing ...

Boulder's Chautauqua Park is especially popular ... One of the most revered treks that originates from the park is the Royal Arch Trail, a moderately challenging 3.5-mile round-trip climb that ...