Colfax Township is township 15 north, range 9 west Congressional survey, and is bounded on the north by Grant Township, on the east by Martiny Township, on the south by Austin Township, and on the west by Big Rapids Township.  The township is drained principally by Ryan Creek, which flows west through the northern part of the township.  There are several good-sized lakes and a number of smaller ponds in Colfax.  The largest is Clear Lake, on section 21.  In the northwest corner are Long Pond and Townline Lake,  On the northern boundary is Pickerel Lake; and in the northeastern part of the township are Colby Lake, Cook Lake, Mud Lake and Twin Lakes.  In the southwestern part of the township is the Grand Rapids & Indiana railroad, which crossed section 31.  On this road was Byers' station and the post office.  The Detroit, Lansing & Northern railroad ran through sections 18, ,17, 16, 15, 14, and 13.  in section 13 the Chippewa branch connected with the main line, and at this junction is the new village of Rodney, which was said to have good prospects for future growth.