coming from the south, east and west, Big River can be reached from Highway 164. The forest is well signed on Highway 164. Go north on the Oquawka-Keithsburg blacktop road for 9 miles. The office is located on the right. For visitors coming from the north, take Highway 17 to Keithsburg. The forest is well signed on Highway 17. Turn left at Main Street and go to the next 4-way stop. Turn right (going south) and go 4 miles on the Oquawka-Keithsburg blacktop. The office is located on the left side of the road.