Here is the couloir I used to descend from the ridge east of Hayden's summit. In places it is extremely steep and loose, sometimes requiring short spots of Class 3/4 scrambling.
I do not recommend this as an ascent route; instead try the crest of the ridge, which appears to go all the way, though likely with sections of loose, exposed terrain as hard as Class 4.
Uinta Range, UT-- August 2013