There are no Nashes listed in the sexton's book for Cedar Hill Cemetery, one of the two primary cemeteries for Ouray County. Cedar Hill primarily served the city of Ouray.
Dallas Park Cemetery primarily served the town of Ridgway. The sexton's book for Dallas Park lists three Nashes and their burial dates.
Charles Elmer Nash 1908
Minnie M. Nash 1930
Phineas J. Nash 1926
Hope this helps, although none match the names you seek.