Utah State University Extension
The Cub River watershed, located in southern Franklin County, Idaho, and northern Cache County, Utah, covers an area of approximately 153,000 acres (239 square miles). The main stream of the Cub River flows in a southwesterly direction from its headwaters in the Bear River Range to its confluence with the Bear River, west of Richmond, Utah.
Extension, USU, "Watershed Fact Sheet: Improving Utah's Water Quality, Cub River Watershed" (2012). All Current Publications. Paper 1261.