We did this side trip on a backpacking trip over to Lost Lake and beyond. We started at Corral Pass. There is not a lot of elevation gain to Mutton from the pass. There is still a faint trail which begins after you have contoured around the mountain. There are tremendous views from the spot. Sadly, no water, or it would make a great place to view sunsets and sunrises. You could carry it as it is about 1.5 miles one way with maybe 400 gain.