The Duodenum is a lollypop out-and-back ride off of Tyler’s Traverse with an intestine-like hillside on the loop portion. 20 or so heavily banked corners will test your slalom skills.
The singletrack trail which connects to Tyler’s is new as of 2015, as is the up-route (an old road conversion) if you ride the loop clockwise.
The trail is 2 way trail the entire way — yet the loop portion is most often ridden clockwise.
This trail is maintained by Central Oregon Trail Alliance.