Beneath the glacier-carved peaks and valleys of Rocky Mountain National Park, below the alpine lakes and rushing streams, a concrete-lined tunnel belies the illusion of a pristine wilderness. In 1944, the two ends of the Alva B. Adams Tunnel were…

The Colorado is the premier river of the American Southwest. Rising in the mountains of Colorado and Wyoming, this river and its tributaries provide water and hydroelectric power for nearly 35 million people in the United States and Mexico, as well as…

The Colorado–Big Thompson Project (C–BT) is the largest transmountain water diversion in the state of Colorado. Built between 1938 and 1956, the C–BT Project provides supplemental water for municipal, industrial, and irrigation purposes in…

Built in 1874 by pioneer homesteader William Zane Cozens, Cozens Ranch was an important early ranch and stage stop in the Fraser River valley in north-central Colorado. The ranch also served for nearly thirty years as the area’s main post office. The…

One of the most destructive wildfires in Colorado history, the East Troublesome Fire began on October 14, 2020, in the central Rocky Mountains east of Troublesome Creek in Grand County. A week later, high winds whipped the fire into a 100,000-acre…

Established in 1874, Grand County lies in the north central Rocky Mountains some sixty-seven miles west of Denver. It is named for the Grand River, an early name for the Colorado River. Encompassing 1,868 square miles, Grand County is bordered to the…