St. Ann Highlands, CO

St. Ann Highlands is a Boulder County census-designated place with 325 residents in the 2020 census, four miles northeast of Nederland. It occupies a ridge between North Boulder Creek and Middle Boulder Creek at about 8,285 feet, with Colorado Highway 119 forming its southern edge. That highway runs west to Nederland and east to Boulder, putting two very different service centers on the same mountain corridor. The Nederland post office serves the CDP, and Boulder County provides the governing framework for this unincorporated community.

The place is organized by the ridge and the road. Mountain addresses use Highway 119 to reach Nederland, Boulder, and the wider Boulder County network, while the two creek valleys set the physical edges. Everyday errands and civic needs point toward neighboring communities and county services, with the Nederland post office serving as the local mail connection. St. Ann Highlands is a small high-country residential pocket defined by its position between two creek valleys and two nearby towns.