The City of Loveland is the home rule municipality that is the second most populous municipality in Larimer County, Colorado, United States. Loveland is situated 46 miles (74 km) north of the Colorado State Capitol in Denver and is the 14th most populous city in Colorado. As of the 2010 census the population of Loveland was 66,859, and in 2019 the population was estimated at 78,877. The city forms part of the Fort Collins-Loveland Metropolitan Statistical Area and the Front Range Urban Corridor. The city's public schools are part of the Thompson R2-J School District.

The Green River, located in the western United States, is the chief tributary of the Colorado River. The watershed of the river, known as the Green River Basin, covers parts of Wyoming, Utah, and Colorado. The Green River is 730 miles (1,170 km) long, beginning in the Wind River Mountains of Wyoming and flowing through Wyoming and Utah for most of its course, except for 40 miles (64 km) into western Colorado. Much of the route is through the Colorado Plateau and through some of the most spectacular canyons in the United States. It is only slightly smaller than the Colorado when the two rivers merge, but typically carries a larger load of silt. The average yearly mean flow of the river at Green River, Utah is 6,121 cubic feet (173.3 m3) per second.The status of the Green River as a tributary of the Colorado River came about for mainly political reasons. In earlier nomenclature, the Colorado River began at its confluence with the Green River. Above the confluence the Colorado was called the Grand River. In 1921, Colorado U.S. Representative Edward T. Taylor petitioned the Congressional Committee on Interstate and Foreign Commerce to rename the Grand River as the Colorado River. On July 25, 1921, the name change was made official in House Joint Resolution 460 of the 66th Congress, over the objections of representatives from Wyoming and Utah and the United States Geological Survey which noted that the drainage basin of the Green River was more extensive than that of the Grand River, although the Grand carried a higher volume of water at its confluence with the Green.

The Town of Estes Park is a Statutory Town located in Larimer County, Colorado, United States. The town population was 5,904 at the 2020 United States Census. Estes Park is a part of the Fort Collins, CO Metropolitan Statistical Area and the Front Range Urban Corridor. A popular summer resort and the location of the headquarters for Rocky Mountain National Park, Estes Park lies along the Big Thompson River. Landmarks include The Stanley Hotel and The Baldpate Inn. The town overlooks Lake Estes and Olympus Dam.

The City of Longmont is a home rule municipality located in Boulder and Weld counties, Colorado, United States. Longmont is located northeast of the county seat of Boulder and 33 miles (53 km) north-northwest of the Colorado State Capitol in Denver. Longmont's population was 98,711 as of the 2020 U.S. Census. Longmont is the 14th most populous city in the state of Colorado.Longmont is named after Longs Peak, a prominent mountain named for explorer Stephen H. Long that is clearly visible from Longmont, and "mont", from the French word "montagne" for mountain.