Horseshoe of Pillow Lava Opening West

My exploration of the East-side Olympics started due to its close proximity to “The Cabin” [see Locale->Lake Cushman->Cabin at L. Cushman].  There are some jewels in the E. Olympics. For example, Reference 2 (p. 28) mentions the basaltic “giant horseshoe shape, open to the west”, including Mt. Constance, Sawtooth Ridge and Mt. Washington. It referred to this formation as “The Crescent Formation”. It also mentioned an inner basalt ring, which included the Needles, that show no “pillows” (see p. 67). I personally enjoy hiking and climbing in areas that have the pillow basalt [aka pillow lava]. Because it is formed under water, it sometimes has some very interesting shapes. Moreover, it is frequently solid and good to climb on! Reference 2 stated that Sawtooth Ridge is “pillow basalt and breccia” (see p. 51). 

The "Olympics_E" photo albums can be viewed by selecting Trails & Routes->Olympics_E->Mt. Gladys Trip1, ->Lena_L_Trip1, ->Mt. Washington (SE Ridge) and ->Lost Peak (Dosewallips R. Trail), ->Mt. Cruiser, ->Mt. Constance, ->Constance Pass from the menu bar above.


  1. Olympic Mountains A Climbing Guide, Fourth Edition
  2. Geology of Olympic National Park, Rowland W. Tabor,1987
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