Fergus Falls is a city in and the county seat of Otter Tail County, Minnesota, United States. Fergus Falls features many different parks (tallgrass prairie and eastern woodlands), stores, and other tourist attractions. The Union Avenue Bridge spans the Otter Tail River, and was recently reconstructed in 2004. Just below the bridge is part of scenic River Walk Park, which spans about a mile of the river. The part nearest the Union Avenue Bridge was redone along with the bridge.