^Looking north along Indiana 51 and US Route 6 from the intersection with Indiana 130 in Hobart, June 2016.
Indiana State Route 51 runs north-south in northwest Indiana, specifically eastern and northeastern Lake County. It's not very long, but it does serve as the main route through Hobart, Indiana. The northern end is at US Route 20, a tiny distance north of Interstates 80, 90, and 94. The southern end is at US Route 30, where the southern end of Hobart meets the eastern arm of Merrillville.