Mt Islip

EASY 33 reviews
#36 of 146 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


mountain biking

horseback riding

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.

3 days 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?

11 days ago

2 months ago

Short. Mildly strenuous. Dogs loved it!

3 months ago

4 months ago

6 months ago

7 months ago

8 months ago

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

8 months ago

The scenery was beautiful, especially with snow

11 months ago

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.

Sunday, November 13, 2016

Monday, November 07, 2016

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.

Tuesday, July 12, 2016

Saturday, July 09, 2016

Saturday, July 02, 2016

Monday, April 18, 2016

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