Summit Del Campo Peak (6,613 ft). Distance: 10 miles RTElevation gain: 4,000ft. Class 3-4. Very fun route when snow covered.
Begin by parking at Barlow Pass and following the Gothic Basin Trail to Foggy Lake. Most of the trip's mileage is consumed by just getting to Foggy Lake, from here, the summit sits about 3/4 of a mile distant and over a thousand above you.
Face the mountain and identify the obvious leftward trending ramp. Follow this ramp until you reach the prominent coulior leading to the notch separating the North and South summits.
Once you reach the notch, climb the 30ft class 3-4 headwall at your left. This is the hardest part of the climb, so be careful when down climbing. Once at the top of the headwall follow the slope to the summit.
Enjoy the views of Sperry, Morning Star, Vesper, Glacier, Sloan, Baker and many, many more significant peaks.
See this page by the Summitpost user Gimpilator for more info.