Trail Run Project Logo

Idlehour Trail 12W16

Intermediate/Difficult

Trail

5.3 mile 8.6 kilometer point to point
76% Runnable
Intermediate/Difficult

Elevation

Ascent: 714' 218 m
Descent: -2,040' -622 m
High: 4,474' 1,364 m
Low: 2,713' 827 m

Grade

Avg Grade: 10% (6°)
Max Grade: 31% (17°)

Dogs

Leashed
Driving directions Take a virtual tour
Zoom in to see details
Map Key

Trail shared by Alex Johnson

A singletrack that connects Mt. Lowe Road to Mt. Wilson Toll Road.

Alex Johnson

Features Fall Colors · River/Creek · Spring · Views · Wildflowers · Wildlife

No parking on Pinecrest Drive on weekends.

Description

The west trailhead is located at the saddle where Mt. Lowe Road #2N50, Middle Sam Merrill Trail 12W14.2, and the Muir Peak Road #2N50.A intersect. The trail goes east and down though open chaparral then enters a nice bigcone spruce grove. It drops into a shady canyon with a seasonal spring then rises out on the north side. The trail then switchbacks down though open chaparral on a slope that has nice wildflowers in spring to Eaton Canyon.

The section of trail down Eaton Canyon follows a beautiful stream and is shaded by alders, sycamores, bay and maple trees that turn bright yellow and orange in fall. There is abundant poison oak and care must be taken to avoid touching it. Idlehour Trail Camp is set along a shady bench above the stream and offers several nice sites with stoves but no tables. Past the camp, the trail climbs out of the canyon though a canopy of sycamores, oaks, bigcone spruce, and mature chaparral. Watch for the impressive groves of manzanita with their shiny mahogany bark. It goes into and out of small canyons with maple groves finally reaching a saddle. From there it drops down to the Mt. Wilson Toll Road about 1 mile above Henninger Flats. The road can be taken down to exit onto Pinecrest Drive in Altadena.

The Idlehour Trail makes a nice loop run when combined with the Mt. Wilson Toll Road and Lower Sam Merrill Trail 12W14.1.

Flora & Fauna

Bigcone spruce, maple, sycamore, alder, bay, oak. Mature chaparral species of ceanothus and manzanita. Beautiful mosses on north facing slopes in spring. Good wildflowers in spring. Beware of abundant poison oak.

Run this trail?

We need help with the following missing trail information:

Photos, Need to Know, Runner Notes

Contacts

Rate This Trail

Rate Quality


   Clear Rating

Rate Difficulty

Share This Trail

Check In

Check-Ins

Dec 25, 2017
Paul Thornton

Trail Ratings

  4.0 from 2 votes

#8740

Overall
  4.0 from 2 votes
5 Star
50%
4 Star
0%
3 Star
50%
2 Star
0%
1 Star
0%
Trail Rankings

#954

in California

#8,740

Overall
15 Views Last Month
429 Since Sep 19, 2017
Intermediate/Difficult

0%
0%
50%
0%
50%
0%

0 Comments

Trail Run Project is part of the REI Co-op family,
where a life outdoors is a life well lived.

Shop REI Running