Jefferson County, Colorado in the context of "Westminster, Colorado"

Genesee Park is a park in Jefferson County, Colorado. It is the largest park in the Denver Mountain Parks system, with a total of 2,413 acres (9.77 km). The land for Genesee Park was initially purchased in 1912 and the park area was largely complete by 1926.

The park contains two mountains, Genesee Mountain at 8,284 feet (2,525 m) above sea level and Bald Mountain at 7,988 feet (2,435 m) above sea level. The park also contains forests of ponderosa pine, Douglas-fir, and lodgepole pine. Interstate 70 traverses the park between exits 252 and 254 along the Lariat Loop Scenic & Historic Byway. On I-70 just west of exit 254, there are scenic overlooks for both directions for viewing the historic Bison herd, which live on maintained pastures on the north and south sides of I-70. The park's bison herd is owned by the City and County of Denver. Some of the original bison were acquired from Yellowstone National Park by the Denver Zoo and the City of Denver as early leaders in the conservation of bison. The bison herd moved here in 1914 and was expanded to Daniels Park in 1938. Thirty five bison were distributed to Native American tribes in 2023.

The Denver Mountain Parks system contains more than 14,000 acres (5,700 ha) of parklands in the mountains and foothills of Jefferson, Clear Creek, Douglas, and Grand counties in Colorado, west and south of Denver.

Owned and maintained by the City and County of Denver, this historic system was launched in 1910 and required Congressional approval in 1914 for the city to purchase federal lands outside its municipal limits. The mountain parks system was created “for the purpose of assuring perpetually to the residents of Denver the sublime scenery of the Rockies, the preservation of native forests and having for all time a pleasure ground in the mountains for the thousands of annual visitors to the city easily accessible.”

The Lariat Loop National Scenic and Historic Byway is a National Scenic Byway and a Colorado Scenic and Historic Byway located in Jefferson County, Colorado, USA. The byway is a 40-mile (64 km) loop in the Front Range foothills west of Denver through Golden, Lookout Mountain Park, Genesee Park, Evergreen, Morrison, Red Rocks Park, and Dinosaur Ridge. The Lariat Loop connects to the Mount Blue Sky Scenic Byway at Bergen Park.

Lakewood is the home rule municipality that is the most populous municipality in Jefferson County, Colorado, United States. The city population was 155,984 at the 2020 U.S. census, making Lakewood the fifth most populous city in Colorado and the 167th most populous city in the United States. Lakewood is a suburb of Denver and is a principal city of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area and a major city of the Front Range Urban Corridor.

The city has a notable student population, as it is home to three higher education institutions: Colorado Christian University, Red Rocks Community College and Rocky Mountain College of Art and Design. Lakewood is also home to the Denver Federal Center, which houses the largest concentration of federal agencies outside of Washington, D.C.

Denver is the central city of a conurbation region in the U.S. state of Colorado. The conurbation includes one continuous region consisting of the six central counties of Adams, Arapahoe, Broomfield, Denver, Douglas, and Jefferson. The Denver region is part of the Front Range Urban Corridor and its metropolitan planning organization is the Denver Regional Council of Governments. The area is also referred to as Greater Denver.

The United States Office of Management and Budget has delineated the Denver–Aurora–Centennial, CO Metropolitan Statistical Area consisting of ten Colorado counties: the City and County of Denver, Arapahoe County, Jefferson County, Adams County, Douglas County, the City and County of Broomfield, Elbert County, Park County, Clear Creek County, and Gilpin County. The population, as of the 2020 Census, is 2,963,821, an increase of 16.5% since 2010.

The Pike National Forest is located in the Front Range of Colorado, United States, west of Colorado Springs including Pikes Peak. The forest encompasses 1,106,604 acres (4,478 km) within Clear Creek, Teller, Park, Jefferson, Douglas and El Paso counties. The major rivers draining the forest are the South Platte and Fountain Creek. Rampart Reservoir is a large artificial body of water located within the forest.

The forest is named after American explorer Zebulon Pike.

Rocky Mountain Metropolitan Airport (IATA: BJC, ICAO: KBJC, FAA LID: BJC) is a public-use airport located in Broomfield, Colorado, United States. The airport is owned and operated by Jefferson County and is situated midway between Denver and Boulder on U.S. Highway 36. It is located 16 miles (26 km) northwest of the central business district of Denver, and is the closest airport to downtown Denver. The airport covers 1,700 acres (688 ha) and has three runways. Formerly known as Jefferson County Airport or Jeffco Airport, the airport was renamed Rocky Mountain Metropolitan Airport on October 10, 2006, although it is sometimes referred to as Rocky Mountain Regional Airport, e.g., on 2007–2012 county planning documents.

This airport is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorizes it as a reliever airport. It is home to a large general aviation population including a fair amount of corporate traffic and several flight schools. The airport's proximity to the nearby Interlocken business district contributes to its business traveler clientele. It has a control tower on 118.6 (local) and 121.7 (ground) that is open from 0600 to 2200 local time. ATIS/AWOS broadcasts on 126.25. There are three runways—12/30 Left and Right and 3/21. The runway numbers were changed in November 2014 to reflect a change in magnetic variation. Two fixed-base operators (FBOs) offer fuel and other services.

Golden is a home rule city that is the county seat of Jefferson County, Colorado, United States. The city population was 20,399 at the 2020 United States census. Golden lies along Clear Creek at the base of the Front Range of the Rocky Mountains. Founded during the Pike's Peak gold rush on June 16, 1859, the mining camp was originally named Golden City in honor of Thomas L. Golden. Golden City served as the capital of the provisional Territory of Jefferson from 1860 to 1861, and capital of the official Territory of Colorado from 1862 to 1867. In 1867, the territorial capital was moved about 12 miles (19 km) east to Denver City. Golden is now a part of the Denver-Aurora-Centennial, CO Metropolitan Statistical Area and the Front Range Urban Corridor.

The Colorado School of Mines, offering programs in engineering and science, is located in Golden. It is also home to the National Earthquake Information Center, on the campus of Mines; and the National Renewable Energy Laboratory, a federally-funded science institution. Additionally, Coors Brewing Company, CoorsTek, Spyderco, Software Bisque, American Mountaineering Center, and Colorado Railroad Museum are located in the city. It is the birthplace of the Jolly Rancher, a candy bought out by the Hershey Foods Corporation, and home to Yeti Cycles. Western showman William F. "Buffalo Bill" Cody is buried nearby on Lookout Mountain.