Casselman River from Markleton to Confluence is a beginner-intermediate run that flows into the Youghiogeny River. The rapids of Cassleman are mostly Class II, but there are a couple of Class III sections. The water flows fast and the river is mostly wide open. The Class III rapids consist of a hole near the beginning of the run after a left bend that can be avoided on the left and later, a narrow river right chute that creates a fairly vigorous drop. Another Class III is a waterfall named Cucumber that should be run to left side of the river.