The Conasauga River is a river that runs through southeast Tennessee and northwest Georgia. The Conasauga River is 93 miles (150 km) long and drains into the Oostanaula River, a tributary of the Coosa River and part of the watershed of the Gulf of Mexico. The river is home to over 90 species of fish and 25 surviving species of freshwater mussels. Its watershed encompasses over 500,000 acres (2,000 km2) in two states, multiple counties, and two ecologically different regions.