Formed by the Coralville Dam in 1949, Coralville Lake is the star of east-central Iowa's recreational lakes, attracting visitors to its waters and shores for more than 60 years. Originally built to control flooding and regulate water levels on the Iowa River, the Coralville Reservoir fast became the go-to destination for water-based fun. Stretching for 23 miles and fed by the Iowa River, the lake provides outdoor activities such as superb fishing, swimming, sailing, and pleasure boating as well as camping, hiking, mountain biking, and beach volleyball. Coralville Lake is home to three campgrounds, which feature more than 500 campsites together, along with sheltered picnic areas and quiet, shady places to relax by the water.