The streams are clear with sand, gravel, and rock substrates. All eight community categories are represented. There are 17 occurrences of large forest tracts and three rookeries. State land consists of one state park, one conservation area, one state forest, and one fish and wildlife area. Most of the acreage in public ownership is in Shawnee National Forest.
Significant features are mature forests, cliffs, bedrock outcrops, swamps, and barrens.
This RRA includes six natural divisions.