From Downtown Across the McKinley Bridge:

Take 70 W to the Salisbury exit, then cross the McKinley Bridge, to Rt. 3 North, to 143 West (left exit).   Stay on 143 West for approx. 6 miles.  This will take you in front of the Argosy Alton Casino to a 4-way stoplight.  At the light turn left (west) onto Rt. 100 West (Great River Road).  Follow Hwy. 100 approx. 12 miles to the park.  We are located on the right side of the highway, just inside the Grafton city limits.