We noticed that you're using an unsupported browser. The TripAdvisor website may not display properly.
We support the following browsers:
Windows: Internet Explorer, Mozilla Firefox, Google Chrome. Mac: Safari.

Mt. San Antonio (Baldy) Loop

A strenuous 11 mile loop hike with nearly 4,000 feet of vertical elevation gain to the 10,068' summit of Baldy.

Content provided by

Rating: 5 out of 5 by EveryTrail members
Difficulty: Strenuous
Length: 10.4 miles
Duration: Full day

Overview :  Any Southern Californian can point out the white topped Mt. Baldy — actually it’s real name is Mt. San Antonio. Baldy is a SoCal icon ... more »

Tips:  Check with the Baldy Village ranger station (909-982-2829) for the latest conditions. Avoid hiking the Devil's Backbone or Baldy Bowl ... more »

Take this guide with you!

Save to mobile
Get this guide & thousands of others on your mobile phone
EveryTrail guides are created by travelers like you.
  1. 1. Download the EveryTrail app from the App Store
  2. 2. Search for the Mt. San Antonio (Baldy) Loop guide
  3. 3. Enjoy your self-guided tour
Get the app

Points of Interest

1. Manker Flats

Look for the sign for the Manker Flats trailhead. Parking is available alongside the road. Remember to put your National Forest Adventure Pass in your car window.

2. View of San Antonio Falls

This hairpin turn marks both the end of the pavement as well as a great viewing point for the seasonal San Antonio Falls. The falls usually run from spring to early summer, depending on the snow fall that year and the temperatures.

3. [JCT] Ski Hut Trail

Note the trail that switches back up the hill to the left. This heads up to the Sierra Club ski hut at the base of Baldy Bowl. You will return via this trail, but for now, continue straight ahead on the gravel road.

4. Top of the Notch

The Baldy Ski resort lodge is here at the top of Baldy Notch. The ski lift to the notch provides an optional shortcut, but check with the resort for days/hours of operation. There is a restaurant at the notch that is also open most weekends year-round.

5. Up the Ski Runs

Follow the ski run up the ridgeline. At the ski resort boundary, you'll see a sign marking the beginning of the Devil's Backbone trail.

6. Devil's Backbone

This gnarly trail follows the ridgeline with precipitous drops on either side. Don't attempt this in ice or snow without proper equipment and the know-how to use it! Even when it's dry, it demands your attention as you hike.

Be sure to stop frequently to soak in the views.

7. Mt. Harwood

If time and energy allow, consider a side-trip to bag nearby Mt. Harwood. Start from the saddle between Harwood and San Antonio.

8. Saddle

This saddle marks the beginning of the final ascent -- a brutal 700' vertical in a very short distance. You're almost there!

9. Mt. San Antonio

The summit of Mt. San Antonio - referred to by locals as "Baldy" - is a round shoulder of gravel and rock. There are several ad-hoc wind shelters constructed with rocks, as it can get very cold and gusty up top.

10. Baldy Bowl

This scree-filled bowl can only be climbed when covered with frozen snow, using crampons and an ice axe.

11. Ski Hut

This ski hut is owned by the Sierra Club and available for rent to members. There are some nice benches hewn of logs. This makes a great rest spot, especially in the springtime when the seasonal San Antonio Creek is flowing.