Chipmunk Creek—O : 11—1885—U. S. G. S.—Characteristic.
Clear Creek—L : 11—1878—U. S. G. S.—Characteristic.
Cliff Creek—Q : 13—1885—U. S. G. S.—Characteristic.
Clover Creek—G : 13—1885—U. S. G. S.—Characteristic.
Cold Creek—H : 14—1885—U. S. G. S.—Characteristic.
Columbine Creek—M : 11—1885—U. S. G. S.—Characteristic.
Conant Creek—T : 1—Prior to 1870—By Richard Leigh for one All Conant, who went to the mountains in 1865, and who came near losing his life on this stream.
Cotton Grass Creek—H : 9—1885—U. S. G. S.—Characteristic.
Cougar Creek—G : 2—1885—U. S. G. S.—Characteristic.
Coulter Creek—R : 8—1885—U. S. G. S.—For John M. Coulter, botanist in the Hayden Expedition of 1872.