Segment: Mt. Islip Trail: Little Jimmy to Mt. Islip
Stats: From Little Jimmy to Mt. Islip: 1.2 miles, 800′ gain. From Mt. Islip to Little Jimmy: 1.2 miles, 800′ loss. Round trip: 2.4 miles,800′ gain and loss
Last Hiked: 2-8-2015
Hikes:
Islip Saddle to Mt. Islip: 6.7 miles, 1580′ gain and loss
This segment begins at Little Jimmy Campground which is along the Pacific Crest Trail. Follow the trail into Little Jimmy and continue along it until you come to a junction that connects with the Mt. Islip Ridge Trail.

Trail leading into Little Jimmy Campground which continues through the campground and up to the Islip Ridge Trail.
The Mt. Islip Trail connects with the Islip Ridge Trail which leads to Mt. Islip. Head in the direction leading up.

View at junction with the Islip Ridge Trail and the Mt. Islip Trail (note: mileage on sign indicates a distance about half a mile longer than it really is). Down on the left leads to Windy Gap. Up leads to Mt. Islip
If coming down from Mt. Islip, the way through Little Jimmy is straight.

Another view of the junction. Straight leads down to Little Jimmy, down on the right leads to Windy Gap
The Islip Ridge Trail leads to a summit trail. Go Right at the sign.

Junction with the summit trail leading to Mt. Islip. Go Right for Mt. Islip and straight to continue along Islip Ridge toward Crystal Lake.
It is then about 0.1 miles to Mt. Islip
More photos here