Located in the San Rafael Swell, this canyon (also known and North Fork of Seger's Hole) is a wonderful technical slot canyon.  There are over 25 drops that must be rapped or downclimbed (some are difficult).  There are many many potholes, some of which require partner climbing or special tools (throw bag, etriers, cheater pole...) to get out of.  Degree of difficulty depends critically on water level.  When we did this one is was quite dry, so we made it through in 5 hours.  If potholes were half full, some would have taken much longer to set up and transit.