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Routes
Hiking trails & Routes
United States
California
San Bernardino County

Telegraph Peak via Manker Flat and Baldy Notch

Moderate

4.6

(7625)

18,027

hikers

Telegraph Peak via Manker Flat and Baldy Notch

03:33

10.0km

900m

Hiking

Hike Telegraph Peak via Manker Flat and Baldy Notch, a moderate 6.2-mile route in the San Gabriel Mountains with 2942 feet of gain.

Last updated: February 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Waypoints

A

Start point

Parking

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963 m

Viewpoint

Viewpoint

2

7.52 km

Thunder Mountain

Highlight • Summit

Thunder Mountain is at an elevation of 9,414 feet above sea level and is part of the Mt. Baldy ski resort. One of the ski lifts ends at Thunder Mountain.

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3

9.99 km

Telegraph Peak

Highlight • Summit

Telegraph Peak sits at an elevation of 8,989 feet, and can be reached by the Three Ts Trail. Hikers can get a great view of Telegraph Peak from Devil's Backbone Trail.

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B

10.0 km

End point

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Way Types & Surfaces

Way Types

6.79 km

2.28 km

929 m

< 100 m

Surfaces

9.07 km

965 m

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Elevation

Elevation

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Weather

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Thursday 9 July

28°C

18°C

0 %

Additional weather tips

Max wind speed: 7.0 km/h

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Frequently Asked Questions

Where does the trail to Telegraph Peak via Manker Flat and Baldy Notch begin, and what are the parking options?

The trail typically starts from Manker Flat. For parking, you'll need an Adventure Pass, which is required for parking at the trailheads within the Angeles National Forest. It's advisable to arrive early, especially on weekends, as parking can fill up quickly.

What is the terrain like on the way to Telegraph Peak?

The terrain is quite varied and challenging. You'll encounter significant elevation changes, starting with a gradual climb on the Mount Baldy fire road to Baldy Notch, which can be paved or gravel. Beyond the Notch, especially on sections like the 'Three Ts Trail', expect steep slopes, switchbacks, and rocky sections. In colder months, snowdrifts can be present, and some narrow ridges, like the Devil's Backbone, feature steep drop-offs.

What notable landmarks or viewpoints will I encounter on this hike?

This route offers spectacular views throughout. You'll pass by Thunder Mountain, providing impressive sights of Telegraph Peak. From the summit of Telegraph Peak itself, you'll be treated to sweeping 360-degree vistas, including Mount Baldy, the Lytle Creek Drainage, Cajon Pass, Cucamonga Peak, and even the high desert.

Is this a suitable hike for beginners?

No, this trail is generally considered strenuous or extra difficult and is not recommended for beginner hikers. It involves significant elevation gain and can be quite long, with parts described as a 'never-ending climb'. Hikers should be prepared for demanding ascents and descents.

What is the best time of year to hike this route?

Spring offers the chance to see wildflowers, while fall provides cooler temperatures and clear views. However, winter conditions can make the trail extremely dangerous due to snow and ice, requiring specialized equipment and experience. It's best to avoid winter unless you are highly experienced and properly equipped.

Are dogs allowed on the Telegraph Peak trail?

Yes, dogs are generally allowed on this trail within the Angeles National Forest, but they must be kept on a leash at all times. Always practice Leave No Trace principles and pack out any waste.

Do I need a permit or pay an entrance fee for the Cucamonga Wilderness or Angeles National Forest?

Yes, you will need a free permit for entry into the Cucamonga Wilderness Area, which can be obtained from the Mt. Baldy Visitor Center. Additionally, an Adventure Pass is required for parking at the trailheads within the Angeles National Forest.

Does this trail intersect with other well-known paths?

Yes, the route utilizes sections of several well-known paths. You'll follow parts of Baldy Road, and a significant portion of the hike traverses the 'Three Ts Trail', which connects Thunder Mountain, Telegraph Peak, and Timber Mountain. There are also connections to other trails like Icehouse Canyon Trail and Chapman Trail, allowing for varied routes.

What amenities are available at Baldy Notch?

Baldy Notch offers some convenient amenities. You'll find restrooms and a restaurant there. It also provides the option to take a scenic chairlift down (or up) to Manker Flat, which can be a flexible alternative for hikers looking to shorten their descent or ascent.

What should I bring for a hike to Telegraph Peak?

Given the strenuous nature and significant elevation, you should bring plenty of water, appropriate footwear with good ankle support, layers of clothing for changing weather, a map or GPS device, and snacks. Trekking poles can also be very helpful for the steep sections.

Are there any specific safety considerations for this trail?

Absolutely. This is a challenging trail. Be prepared for significant elevation changes and potentially rugged terrain. Navigation can be tricky in some areas due to unmarked trails or confusing junctions. Always check weather conditions before you go, especially in winter when snow and ice can make the trail extremely dangerous. Proper preparation and awareness of your surroundings are crucial.

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