On the upper Coralville Reservoir, Hawkeye W.A., northwest Johnson Co. A few miles north of I-80, take the North Liberty/F-28 exit off I-380. Go west on F-28 about 3.5 miles to Greencastle Ave. Take Greencastle 1.5 miles north to Swan Lake Rd., just after a pond on your right. Turn right (east) on Swan Lake, a B-level road here, one half mile to the Babcock entrance road on your left. Follow this to its end at a small peninsula parking area.
On the west shore of Saylorville Lake in Polk Co. Just southeast of Granger, take Hwy. 17 about two miles north from Hwy. 141 to NW 122nd Ave. Turn right (east) and follow the signs to the park. Or, past the west end of the Mile Long Bridge over the lake, go west (slightly right) at the first intersection, and after one half mile turn north on 107th St. and follow the signs.