Fishing on the Willow River 

Presently, the majority of the Willow River is classified as a Class 3 trout stream.

The part of the river below Willow Falls in Willow River State Park and the South Fork of the Willow River from the intersection with the North Fork upstream is classified as a Category 4. Parts of the Willow River (upstream from the Willow Falls dam to the intersection of the North and South Fork of the Willow River and upstream on the North Fork) are a Category 2.

Brown trout are the main trout species throughout the river but brook and rainbow trout are present. The South Fork of the Willow River is managed for brook trout.