Chautauqua Park: Royal Arch Trail, Photo Gallery, Boulder - Denver - Golden - Fort Collins - Lyons, Colorado
Chautauqua Park: Royal Arch Trail
Boulder - Denver - Golden - Fort Collins - Lyons
Royal Arch (6,915') is perched high along a rugged fold in the Boulder Flatirons. These rocks are remnants of the Fountain Formation, a mineral-rich sand eroded from the ancestral Rocky Mountain uplift 300 M years ago. Sediments deposited by the ebb and flow of inland oceans compressed this layer into sandstone, thrust upward 45 M years ago by the same tectonic forces that created our modern Rocky Mountains. Royal Arch is a fragment of the exposed Fountain Formation sculpted by water, wind and mechanical erosion into the 20’ span we see today.
|Related Trails:||Royal Arch|