The western border is formed by faults along the South Platte River and Trout Creek.

The eastern border of the range is the steep, faulted escarpment down to the Colorado Piedmont.

[2][3][4][5] The high point of the Rampart Range is Devils Head at an elevation of 9,748 feet (2,971 m).

[6] The Rampart Range is a anticlinal horst raised along faults on the east, west, and south sides.

The region has experienced repeated periods of uplift, erosion, and deposition over the past 1,000 million years.