John, From Route 21, when you enter Brecksville reservation the road continues toward the junction of Chippewa Creek and the Cuyahoga. About a mile from the termination of the road, it crosses Chippewa Creek. They have gates at both ends, so when the Creek is flowing over the road, the ford is closed. Its closed now for repairs.
The river ford is near #4 on the park map here: http://hikingohioparks.com/images/im...-trail-map.pdf