This chapter describes structural features of outcrops in the Arbuckle Mountains, southern Oklahoma, along I-35 and near Arbuckle Lake. The stops are arranged as though the reader is driving south from Oklahoma City toward Dallas. For a description of stratigraphic stops along this same route, and for a generalized location map and cross sections, the reader is referred to the preceding chapter by Fay. The body of the discussion of outcrops evaluates evidence that the structures and sediments seen in the Arbuckle Mountains formed in an aulacogen that has undergone left-lateral-wrench deformation. All of the outcrops along I-35 are public domain. Parking along the interstate is tolerated as long as vehicles are pulled well off of the roadway and groups or individuals do not cross the highway. If a large group is to examine the exposures, it would be best to park in the scenic turnouts and walk along the highway shoulders. The outcrop described near Arbuckle Lake is in a county-owned quarry that is usually inactive on weekends.