• View from the Canyon Rim Trail. Photo by Jeff Kochevar

    Colorado

    National Monument Colorado

There are park alerts in effect.
show Alerts »
  • Visitor Center is OPEN Oct 1-Nov 30 9am-5pm, Dec-mid March 9am-4:30pm

    Visitor Center is open everyday except December 25

Natural Features & Ecosystems

Ute Canyon
Ute Canyon
NPS Lynne Mager
 

To many, the most outstanding natural features of Colorado National Monument are the park's geologic formations. In each of the canyons, visitors can see the remarkable effects of millions of years of erosion on a landscape of sedimentary rock.

 
Two unusual natural features are common in Colorado National Monument and intrigue both scientists and visitors: biological soil crusts and potholes.
 
biological soil crust
Biological soil crust
 
crust graphic

Have you noticed the bumpy, knobby, and sometimes dark soil along the trails? That’s biological soil crust! Just like a coral reef is formed over time by lots of small organisms living together, soil crust is formed the same way. Moss, lichen, green algae, cyanobacteria (sigh-AN-oh bacteria), and microfungi all work together to hold sand grains in place and create an environment where seeds can grow. Biological soil crust is extremely slow growing; a footprint can erase decades of growth. You can help protect biological soil crust by staying on established trails. Don’t bust the crust!

Potholes are naturally occurring basins in sandstone that collect rainwater and wind-blown sediment. These potholes harbor organisms that are able to survive long periods of dehydration, and also serve as a breeding ground for many high desert amphibians and insects. Both of these communities are very vulnerable to human impacts.

 
potholes
Insects breed in solution pits.
NPS Lynne Mager

Did You Know?

Rim Rock Drive

Colorado National Monument's 23-mile Rim Rock Drive was built almost entirely using picks, shovels, and sheer muscle strength to remove massive rocks and debris. The engineering skill of Rim Rock Drive workers can be seen today in the road's tunnels and stonework. More...