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Los Angeles, CA: Mount Islip
Climb 1,400 feet through a shady stretch of the Angeles National Forest on this 7-mile out-and-back that rewards with summit views from 8,250-foot Mount Islip.
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| Author: | Backpacker Magazine |
| Activity: | Hiking |
| State: | California (CA) |
| Distance: | 6.83 mi |
| Difficulty: | 5 / 10 |
| USGS Topo Map: | Crystal Lake |
| Rating: | Unrated |
Just an hour from downtown Los Angeles, this moderate route is a favorite with dayhikers and is used as a jumping-off point for a multi-day trip in the central San Gabriels. Start at a large parking area off the Angeles Crest Highway at the Islip Saddle (National Forest Adventure Pass required). Cross the road and begin climbing southeast on the well-graded trail. You'll wind through fir and pine forests to a fire-road crossing and the well-established Little Jimmy Campground. A reliable, year-round spring just a few hundred yards from the campground makes it a popular spot for overnighters headed east toward Mount Baden-Powell.
From the campground, the trail loops north and west past a few more secluded campsites before dipping over a ridge for the first trailside views of the Yerba Santa Amphitheater, Pine Flats, and the Crystal Lake Recreation Area. The trail follows a ridge above the basin for about 0.5 mile before a sharp switchback that heads east for the final approach to the 8,250-foot summit of Mount Islip (pronounced eye-slip). You'll pass an old outbuilding—living quarters for old-time fire lookouts—before landing atop the sharp peak, which offers panoramic views of the San Gabriels and, on clear days, the ocean. Follow the same route back to the trailhead.
-Mapped by Casey Schreiner
TO TRAILHEAD: CA 2 N to I-210 E. In 1.2 miles, take the CA 2 exit toward La Canada Flintridge. Turn left onto CA 2 (the Angeles Crest Highway) and drive 39.7 miles. The trailhead is at Islip Saddle on the left.
| Position Format: | Datum: |
Tracks
Mount Islip
| Distance: 6.83 mi | Points: 642 |
Mount Islip
Points of Interest
MTI001
Location: 34.357059, -117.851302From the parking area, carefully cross the Angeles Crest Highway and look for a small metal sign marking the trailhead. Next, ascend a few manzanita-crowded switchbacks.
MTI002
Location: 34.354965, -117.849317Less than half a mile in, the trail enters pine and fir forest. The remainder of the trip travels through shady forests on a moderately graded trail.
MTI003
Location: 34.355369, -117.840461Continue straight on the footpath, crossing a fire road. This road runs roughly parallel to the trail heading toward the Little Jimmy Campground, but it is slightly longer than the trail and not as scenic.
MTI004
Location: 34.347626, -117.836394Near mile 1.7, the trail dips and you'll pass Windy Spring on the right. Though Windy Spring is pretty reliable (look for water-loving trees and shrubs nearby), the flow might drop to a trickle during drought conditions.
MTI005
Location: 34.347405, -117.830823Bear right at the Y-junction to pass through the Little Jimmy Campground, a fairly well-maintained backcountry facility. Continue west, bypassing several picnic tables, camp stoves, and an outhouse. The trail picks up again to the west of the established campsites. The left-leading spur trail near the campground entrance is a 0.3-mile out-and-back to a small year-round spring.
MTI006
Location: 34.346900, -117.831840About 100 yards from the campground entrance, rejoin the trail. You'll loop north to climb a low ridge. The sites in this area overlook the main campground and offer great views of the Antelope Valley to the north.
MTI007
Location: 34.345498, -117.831188Stay right at the Y-junction with Windy Gap Trail. This route crosses back over the ridge and heads west toward Mount Islip. The left-leading trail offers access to a saddle at Windy Gap and Hawkins Mountain, Throop Peak, and Mount Baden-Powell.
MTI008
Location: 34.344417, -117.831019The trail makes a sharp curve to the right and begins climbing a long eastbound ridge overlooking the Yerba Santa Amphitheater, a huge valley walled-in on three sides by the San Gabriels. Damage from the 2002 Curve Fire is still plainly visible, but the views are outstanding. Look east toward the ridge of South Mount Hawkins and south and west toward the Crystal Lake Recreation Area.
MTI009
Location: 34.344198, -117.840084Stay right on the Islip Trail at the Y-junction (bypass the Big Cienega Trail). After the junction, you'll climb the final 150 feet toward the summit, switchbacking once then looping south of the summit before approaching from the north.
MTI010
Location: 34.345019, -117.839966About 50 feet before the 8,250-foot summit, you'll pass the remains of an old stone cabin to your left. Continue climbing toward the summit for panoramic views of the San Gabriels. The west-facing vista of Kratka Ridge, Twin Peaks, and the old CA 39 is especially beautiful.
Trailhead
Location: 34.356887, -117.850626The trailhead, on the south side of the Angeles Crest Highway. © Casey Schreiner
Shade
Location: 34.355004, -117.840128Tall trees create some coverage along this typically shaded stretch of trail. © Casey Schreiner
Little Jimmy Campground
Location: 34.347343, -117.830936Maintained campsites include stoves, tent platforms, and an outhouse. © Casey Schreiner
Trail
Location: 34.346990, -117.831545Keep an eye out for this small sign marking the trail past the campground. The well-worn campground makes it tough to spot the trail entrance. © Casey Schreiner
Views
Location: 34.344466, -117.831253Just after mile 2.7, you'll get this first trail-side view of the Yerba Santa Amphitheater. © Casey Schreiner
Cabin
Location: 34.345110, -117.839731The remains of an old stone cabin near the summit of Mount Islip. © Casey Schreiner
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