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Douglas County

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    Douglas County, one of the original seventeen counties of Colorado, is located on the Palmer Divide, a ridge that separates tributaries to the South Platte and the Arkansas Rivers.
    Douglas County
  • Douglas County Courthouse, 1880



Castle Rock Chamber of Commerce, “About Castle Rock,” 2016.

City of Lone Tree, “About Lone Tree,” n.d.

Colorado Department of Transportation, “Interstate 25 History,” n.d.

Douglas County, “Douglas County, Colorado Historic Preservation,” 2014.

Douglas County Museum, “Allis Ranch: Greenland, Colorado: A Pioneer Ranch on the Palmer Divide,” n.d.

Douglas County Planning Commission, “Douglas County 2035 Comprehensive Master Plan,” Douglas County, 2014.

Douglas County Community Planning and Sustainable Development Department, “Douglas County Profile,” Douglas County, 2011.

Douglas County History Research Center, “Douglas County History Research Center,” Douglas County Libraries, 2015.

Fleta Nockels, “Douglas County Branch History,” AAUW Douglas County Branch, n.d.

Highlands Ranch Metro District, “Highlands Ranch History,” n.d.

Highlands Ranch Mansion, “John Springer,” 2016.

Highlands Ranch Mansion, “Samuel Allen Long,” 2016.

Historic Douglas County, “About Douglas County,” n.d.

Colleen O’Connor, “After 20 years, Lone Tree is setting the bar with incredible potential,” The Denver Post, August 16, 2014.

Office of Archaeology and Historic Preservation, “Douglas County,” History Colorado, n.d.

Parker Area Historical Society, “A Brief History of Parker, Colorado,” Parker Area Historical Society, 2016.

Parker Area Historical Society, “Local Parker Historical Sites,” 2016.

Larry T. Smith, “17 Mile House and Barn,” Parker Area Historical Society, 2009.

The Weather and Climate Impact Assessment Science Program, “South Platte & Arkansas Basins: June 14-20, 1965,” University Corporation for Atmospheric Research, 2007.

Town of Castle Rock Historic Preservation Board, “Walking Tour of Historic Downtown Castle Rock, Colorado,” 2015.

US Department of Agriculture, “Colorado,” US Census of Agriculture, Vol. 1, Part 41 (1940).

US Department of Agriculture, “Colorado,” US Census of Agriculture, Vol. 1, Part 6 (1997).

US Forest Service, “Pike National Forest,” United States Forest Service, 2016.