From the town of Necedah, drive east about three miles on Highway 21. You'll see the sandstone towers right in front of you. Take a right onto the road that parallels the cliff (19th Avenue), and park in a pull-out on your left a half mile down. A short hike through the woods straight back and then uphill to the left will take you to Y-Crack, the southern most formation.

Parking is at coordinates: 44.042510,-90.020508