Via Stevens gulch, but keep low to the base of the climb. Lost Rat is the obvious couloir to the left, on the lower ridge of Grays.
When you get to the sign that leads into Torreys Basin on the main trail, break off and head left toward the obvious snow couloir on the lower slopes of Grays
The approach is about 1.5 miles. Route finding is easy.
Moderate to easy angled snow. Lots of rock fall. when you get to the Y, 3/4's way up, stay to your left and top out on the ridge which leads to summit of Grays. There is 800 ft of good snow climbing.
Usually a cornice at the top. The couloir melts out at the top so be prepared for a scree finish. Pop out of the couloir at about 13,600ft and see the throngs of Grays hikers looking at you quizzically w/all that climbing stuff!!
Either walk the ridge to the top of Grays or just drop down and gain the main Grays trail and head back to your car.
Ice axe, crampons and Helmet.
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