Chimney Rock (Archuleta County, Colorado) Description. H. M. Dunning, Over Hill and Vale (1956) v.1 p.2-3,17-18 Theory explains unique area near Piedra, Colorado. Post Ag 5, 1973 p.51 Continuing postal history of the San Juan Region. includes towns in Archuleta County: Arboles, Carracast Chimney Rock, Chromo, Dyke and Edith. Western Express Ap 1981 No. 125 v.31 #2 p.21 Anasazi ruins near Pagosa Springs object of battle between Chimney Rock Coal Co. and environmentalists RM Ap 12 1984 p.20 6