Marshall Pass and Mt. Ouray, View of Denver and Rio Grande Railroad tracks looping up mountain sides., " Jackson & Co., Denver, Col.", Copyright deposit no. 25862., No Detroit Publishing Co. no., Library of Congress prints and photographs: an illustrated guide / Library of Congress. Washington, : Library of Congress, 1995, p. 75., Copyright deposit. State Historical Society of Colorado; 1949, Mountains. , Passes (Landforms) , United States, Colorado, Marshall Pass. , United States, Colorado, Ouray, Mount.

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Keywords: ., mountains., passes, states--colorado--mar, united