Geologist-author Bruce Bjornstad leads this tour to Wallula Gap. There will be a 4 to 5 mile hike along the flood-sculpted western side of Wallula Gap to the Mounds Pond Overlook. Learn about ice-rafted erratics, spillover channels and other special features of the Ice Age floods. Be sure to snap a photo of the 800-foot tall cliffs of Columbia River Basalt. This tour is organized by the Reach in partnership with the Lake Lewis Chapter of the IAFI. Bus, water and lunch are provided. Duration is 8:00 AM to 5:00 PM.
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