1 map : col. ; 55 x 53 cm., folded to 18 x 10 cm. in cover.
Rand McNally official 1924 auto trails map of Colorado / by Rand McNally & Company ; compliments of the Continental Oil Company.; Auto trails map of Colorado.
Distributed by the Continental Oil Company. Shows trail and highway markings. Telephone poles are painted with black and orange as illustrated. On verso: Rand McNally detailed auto trails map: Denver and vicinity. Scale [ca.1:500,000].