A late spring hike from Cedar Cliffs to Furnace Arch on the Sheltowee Trace. Just as the mountain laurels have just lost their blooms, summer awaits in the freshly mowed Clear Creek Furnace picnic area. Trees are now in full leaf out and shade the karst feature, The Sinks, near the ridge above the picnic grounds, about 1 mile south. Near the arch sandstone boulders and exposed caprock greet the southward hiking pilgrims and introduce them to the geology of the Red River area.