The St. Helena river access (Cedar County Park) is on the Missouri at river mile 798, north of St. Helena. It has a paved boat ramp, vault toilet, shelter, picnic tables and drinking water, with free primitive camping for up to 14 days in any 30.
The roads in are gravel, and the current along the bank is strong. From Yankton, go 1 mi south on US 81, 7 mi east on Road 898 and 0.9 mi north on Road 563.
