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Ice Age Floods

Travel the path of the great Ice Age Floods from Missoula to Portland on this popular geology, birding, and wildlife tour. Our journey begins in western Montana, where a great lake once covered 3,000 square miles of land, before bursting through a massive ice dam and carving many of the geologic wonders we marvel at today. From the giant ripples of Camas Prairie to the astonishing channeled scablands of eastern Washington, the dizzying Grand Coulee and the awesome Columbia River Gorge, this tour keeps you in the flow throughout.

Travel the path of the Ice Age Floods from Missoula to Portland!

By choosing to travel with Portland Audubon, you are supporting our conservation work here in the Pacific Northwest.


Trip Details

  • Trip leaders: Candace Larson & Mary Coolidge
  • Early Bird discount: $1,895 members / $2,095 non-members
  • Deposit: $1,000
  • Single supplement: TBD

Trip fees include all ground transportation, double-occupancy lodging, breakfast/lunch/non-alcoholic beverages/snacks, tips for meals/drivers/porters/local guides, trip materials, entrance fees, excursions, and the services of your skilled leader(s). 

Trip fees do not include airfares, dinners, and alcoholic beverages.

Notes on Accessibility: This trip will include a combination of van-based birding, short walks on well-graded trails, and some hikes on uneven ground (1-4 miles), including occasional steep stretches.



September 12
September 18
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Tara Lemezis