Utah State University Extension
Many people know the Virgin River from the stunning landscape it carves through Zion National Park; however, this is only a small portion of the Virgin River Watershed. The Virgin River flows 162 miles, collecting water from 5,900 square miles of land in southwestern Utah.
Extension, USU, "Watershed Fact Sheet: Improving Utah's Water Quality, Virgin/Santa Clara River Watershed" (2014). All Current Publications. Paper 1279.