Gunbarrel is an unincorporated community and a census-designated place (CDP) located in and governed by Boulder County, Colorado, United States.

[4] Gunbarrel is northeast of the city of Boulder proper, separated by a buffer area of private agricultural lands and publicly owned open space.

Two reservoirs operated by the Boulder and Left Hand Irrigation Company,[6] are located in central Gunbarrel.

The park brings protected wetlands, jogging trails and green spaces directly into the urban area.

At the time, county residents were concerned about the negative effects of development in the adjacent neighborhoods of the city of Boulder.

The RTD regional route J also provides a peak hours connection to the University of Colorado and Longmont.