Indiana State Route 164 runs east out of Jasper to Patoka Lake in southwestern Indiana. West of Jasper, Indiana Route 56 starts heading east into town, then turns northerly onto US Route 231 in downtown Jasper. It is here that Indiana Route 164 is born, taking over as the eastward highway, eventually exiting Jasper and continuing to Patoka Lake. The eastern end is at Indiana Route 145, basically on top of a southern arm of Patoka Lake, between Eckerty and French Lick.