Mt Islip

EASY 38 reviews
#35 of 153 trails in

Mt Islip is a 4.2 mile out and back trail located near Valyermo, California and is good for all skill levels. The trail is primarily used for hiking, horses, and mountain biking and is best used from June until November. Dogs and horses are also able to use this trail.

4.2 miles
1427 feet
Out & Back

dog friendly

kid friendly


horseback riding

mountain biking

The views to the south from the summit of Mount Islip are nothing short of stunning. You can see Crystal Lake, the front range of the San Gabriels, as well as the San Gabriel river canyon. The hike starts out heading up a forest service road for a half mile, then you head left at the signed trailhead to Little Jimmy Camp, one mile ahead. The less ambitious in your group can relax in the camp (it has rest rooms and a spring a 1/4 mile away), while the balance of your group heads up to the summit. The summit trail is at the back of Little Jimmy camp (walk past both rest rooms). The summit trail takes you up some switch backs to a ridgeline. There is a junction with another trail at the ridgeline that comes up from Crystal Lake, but you should stay on the ridgeline trail up to the summit.

4 days ago

Entered Trail at fireroad with yellow gate and traveled approximately 3/4 of a mile and took a left at the trail sign towards Little Jimmy's Camp and proceeded to the top of Mt. Islip. Some small spots with snow on the trail, but easily passable. Great weather and a little windy at the summit.

1 month ago

Had a great day hike up there for Summits on the Air. My gps marked 3.12 from the road to the summit. 6.2 mi round trip. Great little campground with multiple wood stoves for cooking and restrooms 1 mile from the summit. The view is top notch.

2 months ago

This was easy hike and great view but WARNING!!! The direction to Mt Islip in this app is little misguided. It drop us off to park on little Jimmy campground fire road. If it wasn't for running into people we would have missed the trail up because there is no sign on this road telling you Mt Islip trail. How do we tell the app?

4 months ago

Short. Mildly strenuous. Dogs loved it!

8 months ago

10 months ago

I wouldn't say it's easy. Moderate. Great hike. High elevation. Great with dogs.

10 months ago

The scenery was beautiful, especially with snow

Monday, January 09, 2017

Ive hiked Mt Islip about 4 times now during summer and winter. Ive done it 2 times from the Islip Saddle (which is the saddle on the angeles crest highway) and done it twice from the Crystal Lake Recreational center. IMO the crystal lake approach is waaay better than the islip saddle area. Elevation gain from crystal lake is 2,450 ft and 6.6 rt miles. Elevation gain from Islip saddle is about 1,500 ft and 7 miles rt. This is a great hike it's essentially a lower elevated version of Mt Baden Powell. During the winter you can expect a lot of snow on the northern side of Islip since its shaded, so be sure to take crampons and hiking poles as there are several spots on the trail were slipping can be easy to do. Overall good hike above 8,000 ft.

Monday, December 12, 2016

Great view at the end of the trail. Be aware of the high elevation! Bring water!

Tuesday, November 22, 2016

This was a good change of scenery. The dramatic views are unbeatable. There are multiple trails leading to the top of Mt. Islip coming from a few different directions.

Saturday, September 17, 2016

it was a beautiful trail little hard to figure out at some points, almost did the whole thing but kids started giving out on me towards the end.

Saturday, July 30, 2016

Went from the Crest Highway PCT entrance but it basically leads to the same trail. Not very hard and the trail is well maintained. The view at the top was pretty good and the cabin is something cool to see.

Monday, April 18, 2016

Views are spectacular from the summit. Moderate hike but worth the effort.

Sunday, February 21, 2016

This is very nice trail.I would rank the difficulty as moderate. Lots of shaded area.

Thursday, November 19, 2015

Short but gives you a good workout.

Wednesday, January 28, 2015

I hesitate even reviewing this trail. Mt Islip and CLJ are one favorite Los Angeles based hikes and campgrounds.

Part of the PCT Mt Islip is a section of trail offers views, wildlife, plant life and different environments as you trek. This trail is rated moderate in difficulty however it is the elevation that may be more of an obstacle for some who are not use to it. Take your time up the mountain where you will be rewarded with views looking over primarily LA & OC counties and stretching past Catalina Island. A top of Islip is also an old cabin built in the twenties that is still standing.

The hike is approximately 3.5 to 4.5 hours and approximately 6+ miles. Plan on carving out 8 hours with drive time from LA area.

- Most of this hike is on the north face of the mountain. Plan accordingly.
- Water available at LJS.

Tuesday, September 23, 2014

A beautiful secluded hike starting off from Angeles Crest highway, mile marker 66.37. This is the easiest way to Mount Islip and I Took the trail ( Pacific Crest Trail) vs the Fire Road. There are 3 options to Get to Mount Islip and Crystal lake to Windy Gap is a must for all Southern California hikers. This is great elevation training and the views from Windy Gap and the Peak are some of the best. Video of my adventure is posted below.

Tuesday, June 10, 2014

A fairly scenic trail for a pleasant day hike to bag another San Gabriel summit. This one seemed a bit more strenuous than the trail to the summit of nearby Throop Peak I had also done recently. The first mile of trail is moderately steep for my 50 year old butt, but then it levels out for the next mile or so to the Little Jimmy camp site. From there you have about another mile to the summit, and this section of the trail also has its moderately steep parts. Awesome views down into the Crystal Lake basin as you climb towards the summit.

Saturday, September 21, 2013

This was a nice hike from the Angeles Crest HWY. Decent elevation gain and a great view once you get to the top. These is an old stone home used by the forestry service when the tower was still standing. Well worth it, make it an overnighter by backpacking to Little Jimy.

Wednesday, January 23, 2013

Mt. Islip was awesome, my buddies and I hiked it after the snow storm, hiking in the snow with the sun on your back. Took my cam and tripod was not disappointed at all. In my top 25 list of SoCal.
I added a couple of pics "trail with snow"

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