Negro Bill Canyon lies a few miles northeast of Moab, with its mouth abutting Highway 128. It winds its way through a sandstone plateau (location of the Slickrock Trail) toward Porcupine Rim.
A very popular hiking trail runs from the trailhead parking lot to a rock formation called Morning Glory Natural Bridge (semantics prevents its being called an arch). The bridge is at the end of a dead-end side canyon. The vast majority of visitors hike to the bridge (1.5 miles one-way) and return to their cars, unaware of landscape delights farther up the main canyon.
Just before the main trail enters the bridge's side canyon, a lesser trail—sometimes blocked off with rocks or sticks---angles left and heads up the main canyon. This eventually ascends out of the canyon to reach Sand Flats Recreation Area. Very few visitors explore this upper canyon: in my several visits I have seen fourteen hikers there. I have seen a few hundred in the lower canyon.
My first canyon visit was in 2005. Since then I have returned several times, mostly to explore the upper section. That section of the canyon provides access to what is perhaps my favorite area at Moab: the plateau of fins and domes that lies between the canyon and the Colorado River. That area is covered in the “NBC Fins” gallery. Also part of the canyon is a mesa that called to me and which I circumnavigated.
The canyon is named after William Granstaff, an early resident of the area.
Dave,
sorry about the last comment...or lack of it...you get around and take some cool pictures across the western US. It's like scooping out where I want to visit next. Keep it up. Long