Rampart Reservoir or Rampart Range Reservoir is a reservoir northwest of the city of Colorado Springs , Colorado in Pike National Forest . The reservoir is located on a granite plateau approximately above sea level , and consists of a body of water with a capacity of . This water supplies the domestic drinking water for the city of Colorado Springs , and because of this fact , access to the area was briefly limited after the September 11 attacks on the United States . The area today is a popular recreation area for boaters , mountain bikers , and hikers
September 11 attacks
September 11 attacks
Rampart Reservoir