Fiftymile Creek Professional Review and Guide
"Fiftymile Creek is a remote slickrock canyon of exceptional beauty. Seldom visited, the canyon offers solitude and classic scenery. Narrow passages, 500-foot canyon walls, excellent campsites, a perennial stream, and an active population of beaver are among the attractions of this trip. This route is interesting enough to satisfy experienced canyon country hikers, yet easy enough for budding canyoneers to enjoy.
Like all the lower Escalante Canyons, your travels will terminate at Lake Powell. Fluctuating lake levels can further shorten the hike when waters rise to 3,711 feet. For a time after the lake is drawn down to 3,700 feet, its normal pool elevation, treacherous quicksand fills the lower end of the canyon for 0.7 mile."