I think I know where that is. Close to St. George. Just off of the River Road exit on dirt towards the Mount Trumbull Schoolhouse (Rt. 1069). Climb the canyon towards the first pass. Spellings on Benchmark Maps (AZ) show Mocaac Wash and Mokaac Mountain. Probably lots of spelling variations out there. I'll have to explore that area a bit more. Thanks.
Did I say you've got a terrific looking bike!!!
Looks ready for some serious exploring on the AZ strip!