** Use at Your Own Risk **
See the Retired Peak Guides in the Archives for Microsoft Word and other versions of this peak guide.
Location: Los Angeles County, about 13 miles north of Claremont, 42 miles from Los Angeles
|Auto Club||Los Angeles and Vicinity|
|Forest Service||Angeles National Forest|
|USGS Topos||Mount San Antonio 7½, Mt Baldy 7½, Glendora 7½|
|Official HPS Maps
||TPO file - Save to your computer then open with National Geographic TOPO!|
| ||Viewable PDF file - Approximately 2.4 megs|
| ||GPX file or Google Earth KML file to
download to GPS units and other map software (How to use GPX and KML files)|
| ||Routes as shown on
CalTopo using the above files (How to use CalTopo)|
Printable version of this route
(USFS Adventure Pass may be required)
- Distance: 14 miles round trip on trail and cross-country
- Gain: 7200' total, 6600' out plus 600' on return
- Time: 10-12 hours round trip
- Rating: Class 1, very strenuous
- Navigation: Moderate
Original: Howland Bailey, April 1969
DRIVING ROUTE 1
- From the intersection of I-210 and Azusa Avenue (SR 39), drive north
on Azusa Avenue about 12 miles to the intersection at the East Fork
- Turn right and drive 6.1 miles to a parking lot at the end of the
road. Park here.
HIKING ROUTE 1
- From the parking area, pass the locked gate and hike north and east up the road
about 1/2 mile to the beginning of trail 8W16 on the right at Heaton
Flats. There may be a sign "Heaton Flat Trail".
- Take this
trail, keeping right at an immediate fork. Follow the trail up to the top
of the ridge. Continue on the trail over several small bumps to its end at
Allison Saddle (4582').
- Leave the trail and head north up the ridge
following an obvious use trail up to the summit.
On the return trip the ridge forks about 1/4 mile below the summit.
Be sure to the follow the use trail off to the left at this point. Many
experienced hikers have made a mistake at this point.
Wilderness permits are required to hike the Heaton Flat Trail. They
are available at the following locations:
- Self-serve at a kiosk near the entrance to the parking lot.
- The USFS Entrance Station on SR 39.
- The San Gabriel River Ranger District Office at 110 N. Wabash in
- By mail from:
San Gabriel River Ranger District
Angeles National Forest
110 N. Wabash
Glendora, CA 91741
This peak has been climbed from many different directions including a
route that traverses Mount San Antonio.
All of these routes are very
difficult and should not be attempted by inexperienced hikers.
This peak is considered to be the hardest climb in the San Gabriels.
Also known as Big Iron, it was originally called Sheep Mountain by the
early miners in San Gabriel Canyon because of the large bands of Bighorn
sheep that formerly roamed the slopes. The Geological Survey, which mapped
the San Gabriels in the 1890's, ignored the local designation and gave it
its present name.
Please report any corrections or changes to the
Mountain Records Chair.