Bull Valley Gorge to Willis Creek is a classic Grand Staircase Escalante Loop that combines two beautiful yet very different slot canyons with a bit of a cardio workout during the few miles of deep, soft desert slogging in Sheep Creek (the connector drainage between Bull Valley and Willis). The keen observer may discover multiple rock art panels on this route - a minimum of three, and quite possibly more. There is another piece of much more recent and more obvious history on this loop: the historic jeep in Bull Valley Gorge from a fatal car wreck in 1954.
While most of this route is runnable, there are a few short scrambles near the upper end of Bull Valley Gorge. Spring runoff and summer monsoons can turn Bull Valley into a wet, muddy mess; fall and early winter typically sees drier conditions. Bull Valley Gorge and Willis Canyon both have impressive narrow sections and are prone to flash flooding (particularly Bull Valley Gorge, where escape would be impossible in many spots); do not attempt this route if there is any chance of rain in the region.