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Mountain biking trails
United States
California
Los Angeles County
Pasadena

Henninger Flats – Mt Wilson Radio summit loop from Allen

Routes
Mountain biking trails
United States
California
Los Angeles County
Pasadena

Henninger Flats – Mt Wilson Radio summit loop from Allen

Expert

5

riders

Henninger Flats – Mt Wilson Radio summit loop from Allen

05:26

63.1km

1,730m

Expert mountain bike ride. Very good fitness required. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: September 30, 2025

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Waypoints

A

Start point

Train Station

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1

6.79 km

LA County Open Space

Nature Reserve

2

9.01 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 …

Tip by

3

19.4 km

Mount Wilson Trailhead overlook and memorial

Highlight • Viewpoint

Just below the Mt Wilson Trailhead on Red Box Road, this overlook and memorial is a perfect place to pause. Sit and take in sweeping views of the San Gabriel Valley, and read the memorial plaque honoring early conservation efforts.

Tip by

4

20.2 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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5

23.8 km

Observatory overlook

Highlight • Viewpoint

From this spot, you can see the observatory on Mount Disappointment, along with views of the San Gabriel Mountains and Valley.

Tip by

6

24.6 km

Sunrise view

Highlight • Viewpoint

Overlook to the east along the Mt Wilson Red Box road

Tip by

7

27.2 km

Haramokngna – American Indian Cultural Center

Highlight • Historical Site

The visitor center is across from the Red Box Trailhead parking area, with a natural stone viewpoint to the Pacific in the west. It was usually open on weekends and …

Tip by

8

34.1 km

Switzer Truck Trail and Picnic Area

Highlight • Rest Area

Picnic tables and restroom at the upper trailhead to the gravel road

Tip by

9

36.3 km

Clear Creek Vista

Viewpoint

10

39.9 km

Grizzly Flat Trailhead – Hoyt Mountain Rd

Highlight • Trail

Gravel road to the north of the Angeles Crest

Tip by

B

63.1 km

End point

Train Station

Way Types & Surfaces

Way Types

21.5 km

14.3 km

13.8 km

10.7 km

2.23 km

299 m

295 m

Surfaces

42.3 km

14.0 km

5.36 km

983 m

261 m

228 m

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Elevation

Elevation

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Tuesday 28 October

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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