Mount Wilson Summit Viewpoint – Mount Disappointment loop from Altadena

Mountain biking trails

Mount Wilson Summit Viewpoint – Mount Disappointment loop from Altadena

Hard

2.7

(20)

riders

Mount Wilson Summit Viewpoint – Mount Disappointment loop from Altadena

05:56

55.7km

2,090m

Mountain biking

Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike. The starting point of the route is right next to a parking lot.

Last updated: August 19, 2026

Tips

Temporary access restrictions

Includes segments with temporary access restrictions.

After 51.0 km for 1.86 km

Open: • 6:00 AM-8:00 PM (otherwise closed)

Waypoints

Start point

Parking

Get Directions

4.53 km

LA County Open Space

Nature Reserve

6.75 km

Henninger Flats

Highlight • Viewpoint

Henninger Flats sits along the road with views of Altadena. You’ll pass by it while climbing the Mt. Wilson Toll Road and can take a moment to catch your breath …

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16.8 km

Mt Wilson Toll Rd

Highlight • Trail

Junction at the summit of Mt Wilson gravel road with the paved road at the gate to Mt Wilson Skyline Park

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17.3 km

Mount Wilson Summit Viewpoint

Highlight • Viewpoint

Explore the looped road around the summit of Mount Wilson, a prominent peak known for its historic Mount Wilson Observatory. The summit houses telescopes, solar towers, and the modern CHARA …

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18.2 km

Mt Wilson Radio summit

Highlight • Summit

A short climb leads up to the Mt Wilson summit that's covered with telecommunications towers

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22.6 km

Sunrise view

Highlight • Viewpoint

Overlook to the east along the Mt Wilson Red Box road

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29.6 km

Mount Disappointment

Highlight • Summit

This peak offers stunning 360 degree views. On a clear day I was able to see 5 of the 7 Channel islands, San Jacinto, and San Gorgonio.

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37.9 km

Mt Lowe gravel road

Highlight • Trail

Gravel track on former railway from Eaton Canyon to Mt Wilson

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38.3 km

Mueller Tunnel

Highlight • Structure

Mueller Tunnel is definitely a highlight. You ride your bike through the San Gabriel Peak. The tunnel is very short, so you don't have to worry about bringing lights.

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