Hidden Lake, Colorado

Hidden Lake 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 Hidden Lake CDP was 24 at the United States Census 2020. The Ward post office (Zip Code 80481) serves the area.

Geography
Hidden Lake is located in western Boulder County in the Front Range of the Colorado Rocky Mountains. State Highway 72, the Peak to Peak Highway, forms the western edge of the community, leading south 4 mi to Ward and 15 mi to Nederland, and north 27 mi to Estes Park.

The Hidden Lake CDP has an area of 1.620 km2, including 0.037 km2 of water.

Demographics
The United States Census Bureau initially defined the Hidden Lake CDP for the United States Census 2010.