Boulder Area Trails App

The Boulder Area Trails App will shut down on July 1.

Users are encouraged to download COTREX instead.


COTREX - Colorado Trail Explorer - is the state’s official trails app developed by Colorado Parks and Wildlife and Department of Natural Resources. It is the most comprehensive trail map available for the state and is built atop data from over 230 trail managers.

It includes the same features and information found in the Boulder Area Trails App, including trail closures. Boulder County is actively working with COTREX to enhance the accuracy and quality of trail data.

Download COTREX in the App StoreDownload COTREX in Google Play

COTREX - Colorado Trail Explorer