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Ascent of Mount Thomson on 2019-07-20

Climber: Luke Helgeson

Date:Saturday, July 20, 2019
Ascent Type:Successful Summit Attained
Peak:Mount Thomson
    Location:USA-Washington
    Elevation:6554 ft / 1997 m

Ascent Trip Report

East Ridge Ascent

Took Commonwealth Basin trail to the PCT freeway eventually exiting at Bumblebee Pass and following the steep climbers trail up to the pass. There is basically a well tread trail that descends from the pass to the basin and up to the large grassy notch on the east ridge. The basin had plenty of running water. Once on the ridge, there was another climbers trail that led up to the summit block; although much more braided. At the block, done with class 2 terrain, proceeded left (right sucks) and up blocky steps towards a small break in the above tree band continue on the best rock through a second tree band. Above the tree bands and at the next wall go left more than you think, that will bring you to the infamous class 4 section. Plenty of hand holds and foot holds makes for a simple ascent. The summit is only a minute or two from that section. I down climbed the class 4 section but had a 30m handline and anchor material with me. There are plenty of foot holds and using the chimney nature of the feature to brace yourself worked well. Felt like a fun boulder problem... without the soft landing. There is a flat area below the section for a partner to stand and help spot or provide a sturdy pair of shoulders as a step; a good partner. Back at the PCT, I hightailed it over to Alaska Mountain to make better use of that long approach.
Click on photo for original larger-size version.
East Ridge route as seen from Alaska Mountain (2019-07-20). Photo by Luke Helgeson.
Click here for larger-size photo.
Summary Total Data
    Route Conditions:
Maintained Trail, Unmaintained Trail, Exposed Scramble
Ascent Part of Trip: Thomson and Alaska (0 nights total away from roads)

Complete Trip Sequence:
OrderPeak/PointDateGain
1Mount Thomson2019-07-20 
2Alaska Mountain2019-07-20 
GPS Data for Ascent/Trip


 GPS Waypoints - Hover or click to see name and lat/long
Peaks:  climbed and  unclimbed by Luke Helgeson
Click Here for a Full Screen Map
Note: GPS Tracks may not be accurate, and may not show the best route. Do not follow this route blindly. Conditions change frequently. Use of a GPS unit in the outdoors, even with a pre-loaded track, is no substitute for experience and good judgment. Peakbagger.com accepts NO responsibility or liability from use of this data.

Download this GPS track as a GPX file




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