OverviewMcHenrys Peak is separated from Powell Peak by a cleft known as McHenrys Notch. (Not to be confused with the notch on Longs Peak.) The north side of the cleft rises from the basin that feeds Solitude Lake with an angle that approaches 55° towards the top. The deeply inset, 800-foot couloir receives very little direct sunlight and, unlike the corresponding couloir on the south side, usually holds snow year-round.
From the Notch it is possible to continue to either McHenrys Peak or Powell Peak. Both summits are worth a visit. Excellent skiers may want to descend the couloir. The first to do so was Jeff Lowe.
The best times to climb McHenrys Notch Couloir are Summer and Fall. Wait until the avalanche danger has subsided for an early Summer ascent. In September you are likely to find ice in the couloir.
It is not easy to preview conditions for this route. The top of the Notch is barely visible from a number of places in Rocky Mountain National Park, including Flattop Mountain, but the couloir is hidden by the northeast ridge of Powell. This is not true, of course, if you are on the ridge itself, which, however, is not the easiest place to reach.
Getting ThereGlacier Gorge Trailhead and follow the approach to the northwest face of Arrowhead or the south slopes of Thatchtop. From Solitude Lake continue toward the head of the hanging valley, until the couloir appears.
The hike up to Shelf and Solitude Lakes is one of the gems of Rocky Mountain National Park. It is worth doing all by itself. Don't underestimate the routefinding challenge. Once in the hanging valley, sometimes called "Solitude Basin," you'll do a bit of krummholz navigation and a bit of boulder hopping, till you get to the base of the snowfield below Powell Peak's east face.