Sabrina Trailhead to Blue Lake, then following the trail to Baboon Lakes. Skirt the eastern shores of the largest Baboon Lake and head cross country towards the back of the basin and up through talus and open slabs to Sunset Lake (~6 miles). A handful of campsites exist around the mouth of the lake. Follow a bench high above the western shore of Sunset Lake and onto the Thompson Glacier above. Crampons and axe may be useful/necessary on the final approach depending on seasonal conditions.