The western terminus is at Van Meter State Park.

Route 122 begins within Van Meter State Park in Saline County, where the road continues north as VM Pinnacle Drive.

From the western terminus, the route heads south as a two-lane undivided road, passing through wooded areas of the state park.

The road leaves Van Meter State Park and enters agricultural areas.

Past this intersection, the road continues east as Route NN.