Highway 225 began in the unincorporated town of
Ponsford, at an intersection with County State-Aid Highway 26 (CSAH 26) and County Road 129 (CR 129). It passed by the Carsonville Township town and fire hall before leaving the settlement and traveling amongst farm fields. The roadway curved to the south for a half mile before curving back east, following a
section line; the roadway would thenceforth follow section lines for the remainder of its length. After one mile, the road turned southward again at its junction with CR 156 (north) and 270th Street (east). Another mile later, the road turned eastward again, with Guyles Road continuing south and Smokey Hills Road traveling to the west. Two miles afterward, the road turned south yet again at an intersection with Straight Lake Road heading north, and Eagle Bay Avenue heading east to Straight Lake. Another mile south, the highway turned east for the final time and then a mile subsequently reached the junction where it made its final turn south, connecting with Park Trail going north and Washington Drive continuing east. It traveled for one more mile before reaching its terminus at State Highway 34. ==History==