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14C

Mount Islip

8250'

Location: Los Angeles County, about 15 miles north of Glendora, 56 miles from Los Angeles

Maps

Auto Club: Los Angeles and Vicinity
Forest Service: Angeles National Forest
USGS Topo: Crystal Lake 7½
HPS: Route(s), waypoints and explanation of usage

Nearby Peaks: Mount Hawkins, Middle Hawkins, South Mount Hawkins (LO)

Printable version of this route

ROUTE 1

(USFS Adventure Pass required)
Distance: 6 1/2 miles round trip on trail
Gain: 1600'
Time: 3 1/2 hours round trip
Rating: Class 1, moderate
Navigation: Easy

Original: Warren E. von Pertz, 1968

DRIVING ROUTE 1

  • From the intersection of I-210 and Angeles Crest Highway (SR 2), drive 39.5 miles on Angeles Crest Highway to Islip Saddle (mile marker 64.1). Park here.

HIKING ROUTE 1

  • From the parking area (6680'), hike across the Angeles Crest Highway to the Pacific Crest Trail (PCT).
  • Hike up the PCT, past Little Jimmy Campground to Windy Gap.
  • Turn right at Windy Gap and follow the trail up to a junction with a trail coming up from Little Jimmy Campground.
  • Turn left and continue up to a signed junction with the Big Cienaga Trail.
  • Turn right and continue to the summit.

Printable version of this route

ROUTE 2

(USFS Adventure Pass required)
Distance: 2 1/2 miles round trip on trail and cross-country
Gain: 1000'
Time: 1 1/2 hours round trip
Rating: Class 1, easy
Navigation: Easy

Original: George Wysup, September 2000

DRIVING ROUTE 2

  • From the intersection of I-210 and Angeles Crest Highway (SR 2), drive 41.6 miles on Angeles Crest Highway to a parking area on the right at mile marker 66.37. Park here (UTM 240006).

HIKING ROUTE 2

  • From the parking area (7260'), note the large center gully on the south side of the highway with a vertical culvert pipe at the bottom. On the left side of the gully there is an obvious use trail that ascends steeply up the slope.
  • Hike up this use trail, bearing about 210°, 1/4 mile to Windy Gap (7588').
  • At Windy Gap take the upper trail to the west (the lower trail is the PCT).
  • At the first trail junction turn to the left following sign reading "Islip".
  • At the second trail junction (Big Cienega Trail from the south) turn right and continue to summit.

Printable version of this route

ROUTE 3

(Entrance Fee for Crystal Lake area)
Distance: 6 miles round trip on trail
Gain: 2400'
Time: 3 1/2-4 hours round trip
Rating: Class 1, moderate
Navigation: Easy

Original: Warren E. von Pertz, 1968

DRIVING ROUTE 3

  • From I-210 and San Gabriel Canyon Road (SR 39), go north on SR 39 to Crystal Lake Campground.
  • Park in the day-use parking area in the campground near the trailhead to the Windy Gap Trail.

HIKING ROUTE 3

  • From the parking area (5800'+), hike up the Windy Gap Trail to Windy Gap.
  • At Windy Gap take the upper trail to the west (the lower trail is the PCT).
  • At the first trail junction turn to the left following sign reading "Islip".
  • At the second trail junction (Big Cienega Trail from the south) turn right and continue to summit.

ALTERNATE ROUTE

It is also possible to hike up the Big Cienega Trail. Start on the Windy Gap Trail but where it crosses road 3N07 for the second time, turn left (northwest) on the Big Cienega Trail that climbs to the southwest ridge of Islip and meets the main route as mentioned above.


HISTORICAL NOTE

Mount Islip is named for George Islip, who settled about 1880 on land now included in Angeles National Forest (now known as Orchard Camp). There was at one time a fire lookout on the summit. The hut foundation on the summit is a remnant.

History of Summit Signature

Climbing Archives

Please report any corrections or changes to the Mountain Records Chair.


Hundred Peaks Section, Angeles Chapter, Sierra Club
Published 22-December-2005
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