Three Mile Lake Access provides boat ramp and fishing jetty access to Iowa's largest lake in southwest Iowa, located approximately 3 miles north of Afton.

The access point features a hard surface boat ramp, parking, picnic areas, and nearby camping and cabin facilities managed by the Union County Conservation Board.

The 880-acre lake offers no motor size restrictions (except jet skis on the south portion) and serves as a popular destination for anglers and recreational boaters within the Union County fishing lake system.