Pine is an unincorporated community and a U.S. Post Office in Jefferson County, Colorado, United States.

The Pine Post Office has the ZIP Code 80470.

[1] The historic town is also called Pine Grove.

Every summer from 1988 through 2022, the residents held an annual Rhubarb Festival which was sponsored by the Pine-Elk Creek Improvement Association (PECIA).

PECIA is a 501(c)(3) charitable organization that was founded in 1947.