Approach this climb by hiking over Lamarck Col from the North Lake trailhead ( Bishop ), to one of several excellent camp sites in upper Darwin Canyon. See The High Sierra - Paeks, Passes and Trails guide by R. J. Secor for more information. The maps needed are the Mt. Darwin and Mt. Thompson 7.5 minute USGS quads.
This is a pretty straight forward snow and ice climb right up the main ice face. Aim for the gully that narrows down ( to 12' wide ) and ends at the summit plateau. Descend the Northwest Ridge route ( class 3 ).
An ice axe or 2 ice tools, crampons. We free soloed the route, but less experienced climbers may want a 9mm rope and a small rack for rock belays.
If you have information about this route that doesn't pertain to any of the other sections, please add it here.