Mt Sneffels via Lavender and Snake couloir
From Twin Peaks trailhead along the Camp Bird Road, to Mt. Sneffels via the Lavender Col.
Descent is 30m rappel into Snake Couloir, dropping into the northern basin, then reascending into Yankee Boy Basin via an unnamed couloir. This is much easier than going back over the Lavender saddle, though it requires a section of the couloir to be passable (they can develop large cornices).