Complex sentence: It is a tributary of the Wisconsin River as the Yellow River originates in eastern Clark County it flows through Pittsville, Dexter and Babcock in Wood County, Necedah in Juneau before converging into the Wisconsin River near Castle Rock State Park.
Split into simpler sentences: It is a tributary of the Wisconsin River originating in eastern Clark County. It flows through Pittsville, Dexter and Babcock in Wood County, Necedah in Juneau before converging into the Wisconsin River near Castle Rock State Park.