The Sandusky River is a tributary to Lake Erie in north-central Ohio in the United States. It is about 133 miles long and flows into Lake Erie at the southwest side of Sandusky Bay. The Sandusky River, like the Maumee River to the west, is home to the annual walleye run in the spring, specifically March–April. The river also receives a run of white bass a…The Sandusky River is a tributary to Lake Erie in north-central Ohio in the United States. It is about 133 miles long and flows into Lake Erie at the southwest side of Sandusky Bay. The Sandusky River, like the Maumee River to the west, is home to the annual walleye run in the spring, specifically March–April. The river also receives a run of white bass around the same time in the spring. The numbers of walleye that return to spawn upstream are not as great as those that return to the Maumee River. The Ballville Dam, built on the Sandusky River in Fremont, Ohio, blocked migration for walleye and other fish. As fish can swim farther upstream in the Maumee, they have access to more spawning areas and have developed a larger population than in the Sandusky River.