Indiana State Road 650 is a 0.9 miles (1.4 km)-long spur of U.S. Route 50. The highway is entirely within Martin County and connects U.S. Route 50 at Martin State Forest to a USG Corporation plant in Willow Valley. The eastern end of the highway is located at the plant's entrance.
SR 650 begins at a four-way intersection with US 50. North of the intersection, the road becomes the main entrance to Martin State Forest. SR 650 heads south from the intersection but curves shortly afterward to head east-southeast. After crossing a tributary of the White River, the road ends at the entrance to the USG plant. The end sign for the road is attached to the USG plant's gate. SR 650 is an undivided two-lane road for its entire length.
The entire route is in Willow Valley, Martin County.
Route map: Google / Bing