 By 1930, PA 68 paved between US 322 northwest of Clarion and Paint Mills, Arthurs and Snydersburg, and around Leeper while the state highway was under construction between Paint Mills and Arthurs, Snydersburg and southwest of Leeper, and the Clarion/Forest county line and Roses.In the 1930s, the entire length of the route between Clarion and Kane was paved.PA 68 was extended northwest from Kane along a paved road to PA 59 in Kinzua in 1935.