OTL Home Guide
Guidebook Entry/

Mt. Williamson - Log in to edit.

Category: Climbing



A plethora of sport climbs up high in the San Gabriels.

Relevant Guidebooks & Maps

Sport Crags in Southern California, Climber's Guide to Southern California, Rock and Ice March/April 1994


Take 210 West to Pasadena. From Pasadena take 2 into the mountains. Follow 2 for 38 miles to the parking lot on the left. The drive takes about 1 hour and 15 minutes.


UPDATE: Mount Williamson is CLOSED until further notice. Do NOT climb here. More information here: http://williamsonrock.org/

Williamson is the LA Sport climbing area. Troy Mahr and an assorted group of locals have established a couple hundred routes with ungodly sized bolts and little to no runout - complete sport climber style. The rock is this meta-fractured granite that makes for many sustained 5.11's and 5.12's. There are a handful of 9's and 10's and some easier routes, but not many. The area is at altitude, so it makes for a perfect place to go in the warm months from late April until even December sometimes. The best wall is the London Wall that contains many classic 11's and 12's. The time to go and wait in line for all these climbs is Sunday afternoon. The setting is beautiful and driving there on Sundays is like a video game with all the streetbikers on the LA crest hwy.

Safety Notes

Watch for rockfall and as always bring plenty of water. Snow covers Williamson all winter.

Edited by (in order): OTL Staff, Will Hummel

Last updated: 09/09/2011


You are not logged in.
Log in.


Upcoming Trips
Check the OTL calendar to stay up to date on the latest trips and activities.


What's Going On?
Post a message to our mailing list.

Subscribe to our mailing list to stay informed about what's going on at OTL.