Lake Afton is a 258acre man-made recreational lake in Sedgwick County, Kansas, United States, and within the 720acre Lake Afton Park. It is located east of the intersection of Viola Rd (263rd St W) and MacArthur Rd (39th St S), between the communities of Goddard, Garden Plain, Schulte, Viola.HistoryGround breaking for the dam occurred on December 29, 1939. The dam was built by Works Progress Administration workers from 1939 to 1941. It opened to the public in 1945.The Sedgwick County Commission let a contract for the construction of the Segwick County Boys Detention Home within the Park in April 1960.Lake Afton Public Observatory was constructed within the Park in the late 1970s on the north side of MacArthur Rd.DirectionsLake Afton is located at 24600 W 39th St S, which is east of the intersection of Viola Rd and MacArthur Rd in rural western Sedgwick County. MacArthur Rd is located 3mi south of U.S. Route 54 / U.S. Route 400 highway.Directions: from Goddard, 3mi west on U.S. Route 54, 3mi south on Viola Rd, 0.7mi east on MacArthur Rd. from Garden Plain, 2mi east on U.S. Route 54, 3mi south on Viola Rd, 0.7mi east on MacArthur Rd. from Schulte and K-42, 8.7mi west on MacArthur Rd. from Viola and K-42, 9mi north on Viola Rd, 0.7mi east on MacArthur Rd.