^Looking south from the northern end at US Route 36 near Mount Summit, April 2026.

Indiana State Route 103 runs north-south in east-central Indiana.  It parallels Indiana State Route 3 to the east, where both routes run north-south through New Castle and the surrounding area.  The northern end is north of New Castle, at US Route 36 near Summit Lake State Park, and the southern end is just south of Interstate 70 at US Route 40 in Lewisville. (No interchange provides connection between Interstate 70 and Indiana Route 103.)

This page once featured an older photo for Indiana Route 103, but it has since been replaced by a newer photo. This newer photo appears next, but the older photo is also viewable. The older photo has been relocated to the bottom of this page.

My new photo for Indiana Route 103 shows the northern end marker, included in a northbound guide assembly at US Route 36. This is near Mount Summit and Summit Lake State Park. This photo was taken looking north in early April 2026, as I was driving US Route 36 westward across Indiana.

My older photo for Indiana Route 103 is the eastbound junction marker on US Route 40, approaching the junction of these two routes in Lewisville. (My old car, Winona, is parked front-and-center in this shot-- a practice I try not to repeat anymore.) This photo was taken in October 2016 on my way eastward into Ohio.

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