Mueller Tunnel – Mt Wilson Radio summit loop from Altadena

Mountain biking trails

Mueller Tunnel – Mt Wilson Radio summit loop from Altadena

Hard

4.8

(1292)

6,284

riders

Mueller Tunnel – Mt Wilson Radio summit loop from Altadena

04:25

39.1km

1,610m

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 accessible with public transport.

Last updated: August 2, 2026

Tips

Temporary access restrictions

Includes segments with temporary access restrictions.

After 499 m for 1.86 km

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

After 36.8 km for 1.86 km

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

Waypoints

Start point

Bus stop

Get Directions

1.00 km

Andrea Wilson Triangle

Nature Reserve

10.3 km

Ye Alpine Tavern ruins

Highlight • Historical Site

This campground was once a glorified tavern being able to sleep 185 guests and included a ballroom, multiples stories, a kitchen, and dining hall. It was a stop along the …

Tip by

15.5 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.

Tip by

15.9 km

Mt Lowe gravel road

Highlight • Trail

Gravel track on former railway from Eaton Canyon to Mt Wilson

Tip by

18.4 km

Wilson Observatory overlook

Highlight • Viewpoint

Viewpoint to the east to the Wilson Observatory

Tip by

19.0 km

Mt Wilson Radio summit

Highlight • Summit

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

Tip by

19.5 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

Tip by

23.1 km

Mount Lowe Motorway

Highlight (Segment) • Trail

The Mount Lowe Motorway can be accessed from Mount Wilson Red Box Road. This upper section descends to the intersection with the trail to Inspiration Point, with views along the …

Tip by

39.1 km

End point

Bus stop

Way Types & Surfaces

Way Types

25.9 km

11.8 km

1.32 km

< 100 m

Surfaces

19.5 km