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    Northwest Geology Field Trips, by Dave Tucker, is licensed under a Creative Commons Attribution-Noncommercial- Share Alike 3.0 United States License. You can use what you find here, repost it with attribution to the author, "remix" it for your own purposes, but may not use it with the intent of making money off of it.

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Guided geology trip to Ptarmigan Ridge, Mount Baker

Mount Baker and Rainbow Glacier from Ptarmigan Glacier.

Mount Baker and Rainbow Glacier from Ptarmigan Glacier.

There are three spaces left on North Cascade Institute’s guided geology hike [led by yours truly] to the volcanic wonders along the Ptarmigan Ridge trail. This traverses the high country between Mount Baker and Artist’s Point at the end of the Baker Highway.

Sunday, September 29 Rendezvous in Glacier at 8 AM. An all day hike, about 6 miles round trip, 500′ elevation gain/loss. $95 includes bus from Glacier.

Sign up info here:


Here’s the NCI blurb:

Experience time travel by foot on the Ptarmigan Ridge trail in Mount Baker’s radiant late-summer high country. Our field excursion will begin above tree line at Artist’s Point at the end of the Mount Baker Highway before venturing out toward the simmering, glaciated volcano herself. Along the way, we’ll travel over ancient records of volcanism as we traverse the 1-million-year-old Kulshan caldera, a giant volcano that erupted cataclysmically through a continental ice sheet long before Mount Baker built itself from stacks of lava.

As we hike past lava domes that erupted shortly after the caldera collapsed, we’ll lay hands on much younger columnar andesite that still predates Mount Baker, discuss the origin of the eroded table at Table Mountain, and examine layers of volcanic ash preserved in the soil, including the famous Mount Mazama/Crater Lake layer.

Dave is a leading geological expert on the Mount Baker region and will share his intimate knowledge of the natural and cultural history of the area. He’ll interpret the story of this landscape as evidenced in its rocks and ash.


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