The enclosed beta for the approach is excellent. I would make one addition. After passing Alpine Lake you ascend to a pass on the northeast of peak 9769. When approaching the pass stay high and to your left as you ascend. Aim for a second smaller pass on the flank of the peak above a section of solid rock steps on the ridge. This is where you will find the climbers trail which easily traverses the talus slope and then drops into the Warbonnet Lake Cirque. Avoid crossing the pass at its lowest point as this leads you onto a very unstable and somewhat dangerous talus slope.