Stapleton, Denver Lake Nature Center, one of the nation's largest urban wildlife refuges. As of 2018, Stapleton has a population of around 75,000 residents living amongst 23,500 households. The Northfield section of the development (north of Interstate 70) still has significant residential and commercial development occurring today. The University of Colorado A-Line directly connecting Denver Union Station downtown to Denver International Airport started operating in 2016 and has one stop in Stapleton; the Central Park Station. Stapleton is served by the Central Park commuter rail and bus station, with direct connections to Union Station in downtown and the Denver International Airport via
Stapleton International Airport Denver to El Paso, St. Louis and Tulsa. Frontier operated northbound and southbound from Denver to the other mountain states. Western connected Denver to Minneapolis and Edmonton. The April 1957 OAG shows 38 United, 12 Continental, seven Braniff, seven Frontier, seven Western, five TWA and one Central. The jet age arrived in May 1959 when Continental began operating Boeing 707 jetliners into Stapleton, initially under weight restrictions due to Stapleton's runway capacity. Runway 17/35 and a new terminal building opened in 1964. Although Stapleton officially adopted the "International" name in 1964, its first nonstop international service came in 1968, when