** Use at Your Own Risk **
See the Retired Peak Guides in the Archives for Microsoft Word and other versions of this peak guide.
Location: Ventura County, about 15 miles south of Gorman, 85 miles from Los Angeles
- Auto Club: Ventura County
- Forest Service: Los Padres National Forest: Mt Pinos, Ojai and Santa Barbara Ranger Districts
- USGS Topo: Cobblestone Mtn 7½, Black Mountain 7½, Alamo Mountain 7½
explanation of usage
Nearby Peaks: Alamo Mountain, McDonald Peak, Sewart Mountain, Snowy Peak, Black Mountain #2, White Mountain #2
Printable version of this route
(USFS Adventure Pass required)
- Distance: 14 miles round trip on road, trail, and steep loose
- Gain: 5200' total, 2700' out plus 2500' on return
- Time: 8-10 hours round trip
- Rating: Class 2, very strenuous
- Navigation: Difficult
- Leader Rating: "I", normal conditions
Original: Warren E. von Pertz, January 1974
DRIVING ROUTE 1
- Go north on I-5 to the town of Gorman. Get off on the signed Gorman
- Turn left at the bottom of the off-ramp and go under the freeway.
- Go 0.1 mile to Peace Valley Road. Turn right.
- Go 1 mile to the entrance to Hungry Valley Recreation Area on your
left (paved). Turn left. Note your odometer and go as follows:
- At 0.2 miles, entrance station. If manned, you can
avoid payment of the fee by telling the State Park employee that you are
passing through to Alamo Mountain.
- At 5.2 miles, intersection. Turn right (west) toward "Piru Creek",
- At 11.2 miles, improved car camping area on right, with toilets.
Often used as a meeting point.
- At 11.4 miles, Piru Creek crossing. There is a seasonal gate just
before this stream crossing.
- At 13.4 miles, the pavement ends.
- At 17.8 miles, fork to the left. Keep right.
- At 17.9 miles, junction with the Alamo Mountain Road.
Turn left. (To the right
leads to Twin Pines Campground and Alamo Mountain
Route 2.) Note your odometer again and go as follows:
- At 3.3 miles, fork immediately beyond a small road cut through the
ridge. To the right leads to Alamo Mountain
Route 1. Turn left.
- At 4.0 miles, the road continues east at the Little Mutau trailhead.
Past this point the road can sometimes be poor but is usually passable.
- At 6.3 miles, the parking spot for McDonald Peak.
- At 7.2 miles, a dirt berm, a sign indicating no further motor vehicle
and a large parking area, suitable
for car camping. Park here.
HIKING ROUTE 1
- From the parking area (6500'), pass the gate and hike east on the old
road for 1 mile to the obvious high point of the road. This is the
summit area of Sewart Mountain.
- Continue downhill
on the old road for about 0.5 mile to a fork with an obscure road on
the right, signed "Sespe Wilderness". Turn right onto this road
(continuing straight leads to Snowy Peak and
Black Mountain #2).
- Follow this overgrown road as
it first descends steeply south to a saddle, turns east over bump 6043',
then proceeds downhill in roller-coaster fashion.
- After about 2.5
miles the overgrown road turns to trail. Follow the trail eastward onto
the northern slopes of a forested ridge, looking for a side trail coming
steeply in from the right, possibly signed "Cobblestone Trail".
- Turn right on this side trail, which is very deteriorated and should be
considered cross-country travel.
- Take this old trail as it goes southeast
up a ridge. After a long 1/2 mile it comes to a fork in a shallow saddle
with the remains of a sign (5840'+). Continuing straight along the ridge
goes to White Mountain #2. Cobblestone Mountain can
be seen directly to the south.
- Take the right fork and follow an
overgrown, rough trail down through a saddle (5300'). Beyond the saddle
the trail is primitive, with occasional ducks, and is essentially
cross-country. It passes first through a break in the large buttress south
of the saddle, then ascends steeply to and then through a series of loose
steps composed of conglomerate rocks that give the peak its name, and
finally exits onto forested slopes near the summit. The summit has a very
fancy register box.
Cobblestone Mountain is often combined with White Mountain
#2. This hike is 16 miles round trip and has 6500' gain.
The peak is in the Sespe Wilderness, but permits are not
required at this time.
Contact the USFS at (661) 245-3731 for information about the status of
the seasonal gate at the Piru Creek crossing.
Please report any corrections or changes to the
Mountain Records Chair.
Hundred Peaks Section, Angeles Chapter, Sierra Club
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