First conceived in 2004, the M.A.S.50 is the event that brought attention to Moab’s trail running scene. Alpine to Slickrock says it all: where else can you cross three mountain passes at or over 11,000 ft. and finish on beautiful slickrock terrain? The M.A.S50 is an ultra that will leave even the most seasoned runner wishing he had trained harder! Past runners have even referred to it as a mini Hardrock! If a gritty, physically challenging race is on your to-do list, then put the M.A.S.50 on your ultra calendar.