Life in the Fast Lane
"She had a nasty reputation as a cruel dude,
They said she was ruthless, said she was crude..."
She had a nasty reputation as "impossible", which has diminished of late due to several descents, but among veterans she inspires a hefty respect.
Sandthrax is a short, intense canyon in North Wash, next to the Leprechaun system. The stopper section is a 5" to 10" vertical crack about 15 feet tall, with 30 feet of exposure. It has been stemmed up high - very exposed and rated as 5.11c(?) - no thanks! The few who have tried to really free it say very awkward hard 5.10 or ... Personally, AFTER aiding as high as I could on two #6 Camalots, I thought it was still hard 5.9 or 5.10 to get over the top. Needless to say, intelligent Sandthraxers need a robust strategy for passing this obstacle.
Outside this short bit, the canyon is a quite nice, sustained, not extremely difficult X- (X minus) high-stemming/mae west canyon that can be quite pretty and is fun for the mae-west-proficient. Most of the canyon can be cautiously passed in a back-feet chimney, with only a couple silos that require stretching out more, although the length of the sections without relief can be quite daunting. Don't underestimate the rest of the canyon - it is grueling.