Gunbarrel, Colorado

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Gunbarrel, Colorado
Gunbarrel Commons Park in Gunbarrel.
Gunbarrel Commons Park in Gunbarrel.
Location of the Gunbarrel CDP in Boulder County, Colorado.
Location of the Gunbarrel CDP in Boulder County, Colorado.
Gunbarrel is located in the United States
Location of the Gunbarrel CDP in the United States.
Coordinates: 40°03′48″N 105°10′17″W / 40.0632359°N 105.1712857°W / 40.0632359; -105.1712857 (Gunbarrel CDP, Colorado)Coordinates: 40°03′48″N 105°10′17″W / 40.0632359°N 105.1712857°W / 40.0632359; -105.1712857 (Gunbarrel CDP, Colorado)[1]
Country United States
State Colorado
CountyBoulder County
 • Typeunincorporated community
 • Total6.309 sq mi (16.340 km2)
 • Land6.249 sq mi (16.185 km2)
 • Water0.060 sq mi (0.155 km2)
Elevation5,285 ft (1,611 m)
 • Total9,263
 • Density1,482/sq mi (572/km2)
Time zoneUTC-7 (MST)
 • Summer (DST)UTC-6 (MDT)
ZIP Code[3]
Boulder 80301
Niwot 80503
Area codes303 & 720
GNIS feature[2]Gunbarrel CDP

Gunbarrel is an unincorporated community and a census-designated place (CDP) located in and governed by Boulder County, Colorado, United States. The CDP is a part of the Boulder, CO Metropolitan Statistical Area. The population of the Gunbarrel CDP was 9,263 at the United States Census 2010.[4] The Boulder post office (Zip Code 80301) and Niwot post office (Zip Code 80503) serve the area.[3]


Gunbarrel is northeast of the city of Boulder proper, separated by a buffer area of private agricultural lands and publicly owned open space. The buffer areas provide over two miles (3 km) of separation over changing elevations.[5] This reduces the impact of the Boulder Municipal Airport and the Boulder County Sheriff's Department facilities (including the county jail), which are located on the southern side of the buffer.

Two reservoirs operated by the Boulder and Left Hand Irrigation Company[6] are located in central Gunbarrel. Irrigation ditches and canals, including the Boulder and Whiterock Ditch, pass through this primarily residential area. The Twin Lakes Open Space, a large park which includes the two reservoirs and extends west along the ditch, is operated by the Boulder County Parks and Open Space Department. The park brings protected wetlands, jogging trails and green spaces directly into the urban area. The City of Boulder operates Eaton Park, adjacent to the west lake. Eaton Park includes picnic facilities, BMX jumps and additional protected wetland. Flood control facilities are integral to the reservoir and canal systems, but they do not eliminate the flood risk to adjacent development.

The Gunbarrel CDP has an area of 4,038 acres (16.340 km2), including 38 acres (0.155 km2) of water.[1]

Natural hazards[edit]

The principal natural hazard in Gunbarrel is flooding. The county Transportation Department provides floodplain information through an online request page, free of charge for property owners in the unincorporated areas of the county, including Gunbarrel. Boulder County participates in the National Flood Insurance Program which allows some reduction in the cost of flood insurance for residents.[7]


Climate data for Gunbarrel, Colorado
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Average high °F (°C) 46
Average low °F (°C) 22
Source: Accuweather[8]


The United States Census Bureau initially defined the Gunbarrel CDP for the 1980 United States Census.

Gunbarrel CDP, Colorado
Source: United States Census Bureau


The Gunbarrel Public Improvement District (GPID), formerly the Gunbarrel General Improvement District, was formed by residents of Gunbarrel in 1993. At the time, county residents were concerned about the negative effects of development in the adjacent neighborhoods of the city of Boulder.[9] They felt they needed to counterbalance the city's annexation and development powers and better manage the traffic city development was creating. The GPID is administered by the Boulder County commissioners. The GPID is a 'special district' under Colorado law, with the ability to levy taxes and incur debt. GPID uses this money to purchase open space and improve roads in the unincorporated subdivisions, consistent with their primary mission of maintaining quality of life and property values in unincorporated Gunbarrel. GPID open space lands are managed by Boulder County Parks and Open Space. A map of GPID lands can be found at the Gunbarrel Community Association website. This map also depicts the boundaries of the District's taxation area.


The 205 bus of the RTD bus system gives service throughout Gunbarrel and into Boulder. Roads and streets in Gunbarrel are maintained by Boulder County.

The RTD regional route J also provides a peak hours connection to the University of Colorado and Longmont. Once built to its planned full extent, if it ever actually happens, the RTD B Line is rumored to have a station in Gunbarrel.

See also[edit]


  1. ^ a b c "State of Colorado Census Designated Places - BAS20 - Data as of January 1, 2020". United States Census Bureau. Retrieved December 8, 2020.
  2. ^ a b c "U.S. Board on Geographic Names: Domestic Names". United States Geological Survey. Retrieved December 8, 2020.
  3. ^ a b "Zip Code 80301 Map and Profile". 2020. Retrieved December 20, 2020.
  4. ^ "2010: DEC Summary File 1". United States Census Bureau. Retrieved December 20, 2020.
  5. ^ Boulder County Open Space Maps, accessed 30 May 2007
  6. ^ Twin Lakes Open Space information page, Boulder County Parks and Open Space Department, accessed 30 May 2007
  7. ^ Flood Control information page, Boulder County Transportation Department, accessed 7 June 2007
  8. ^ "Gunbarrel Weather". Retrieved August 22, 2015.
  9. ^ GPID History and Current Status Archived 2007-09-27 at the Wayback Machine, Gunbarrel Community Association website, accessed 19 June 2007

External links[edit]