COGS Geo-Exploration: Gray Butte

  • 4 May 2022
  • 10:00 AM - 3:00 PM
  • Skull Hollow Day Use Parking Area, Gray Butte, Terrebonne, OR

COGS Geo-Exploration: Gray Butte

Led by Derek Loeb

Wednesday, May 4, 10:0 am – 3:00 pm

Hike a 4 mile out and back trail with about 500' elevation change to examine  outcrops of rhyolite tuffs and dikes associated with the Crooked River Caldera.  We will meet at the Skull Hollow Day Use Parking Area and after check in and a short introduction we will drive up to Gray Butte Ridge where we will park. From there we will hike to Austin Cresson Viewpoint where we will eat lunch/snack before returning.

As a reminder, all participants are required to be fully vaccinated and boosted and must be a COGS member or a guest of one. If interested in registering, please use the COGS Meetup site:

Central Oregon Geoscience Society

P.O. Box 2154,  Bend, Oregon 97709

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