Colorado River Historical Society Museum Colorado River Historical Society Museum Preserving the history of the Tristate area Welcome to the Colorado River Museum The mission of Colorado River Historical Society shall be to operate a museum to promoteinterest and knowledge concerning the history of the Lower Colorado River area most specificallythe Tristate region. Come visit to see ourunique historylocal artifacts and museum gift shop. The CRHS Museum is operated by a staff of dedicated volunteers and is typically open between October and May with our winter hours and reduced hours during the Summer months. For group visits and school tours please contact the museum by calling or send us a message via email link.