See Approach described in Mountain Overview section on the Main Page.
From the headwall of the saddle between Thompson and Williamson head to the left side closest to Thompson. Here you will find a breach in the wall that will allow you to scramble up to the saddle with little difficulty. From the saddle traverse up and around the west side of peak onto class 2 scree and talus. Follow this up towards the south side of the peak close to Saddle between Thompson and Mickey Spire. You will find a short couloir/gully here that contains a bit of class 3 scrambling to take you to the summit. The total distance round trip from the trailhead is roughly 13-14 miles.
nothing speacial, but depending on the conditions when you go, an ice axe and crampons might be useful.
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