“A rougher loop that can be added on the Main Loop.”
— Jeff Fox
This is generally considered a mountain biking spot so be aware of your surroundings and of other users on the trail.
The Stinking Springs Loop goes left off of the Main Loop
just before dropping into the Rib Cage and loops back in to the same spot so you don't miss anything. Stinking Springs starts with a very gradual climb through sagebrush on smooth singletrack with great views of the LaPlata mountains. Shortly after reaching the "Pinnacle" you'll reach a descent known as the Vertebrae. Vertebrae has big banked turns and jumps for the numerous mountain bikers on the trail.
At the end of Vertebrae, you'll reach the somewhat rougher section of the Moki downhill followed by a short ascent up the Moki climb. After the climb, the trail rolls and drops slightly to a section of mixed singletrack and slickrock known as the Rim, which is bumpy and rocky; but on the other side, the trail returns to smooth singletrack again before Stoneaxe hill, another climb.
Shortly after Stoneaxe there is a ledgy step down that has gotten pretty ugly with multiple lines developing. Some smooth trail leads you slightly uphill back to the junction with the Main Loop
at the top of the rib cage.