Northwest Geology

Part of the free Urban Nature Series

2 pm–3 pm, meet at the Visitor Center

Led by Paul Edison-Lahm

Learn about the cataclysmic glacial lake outburst floods that swept periodically across eastern Washington and down the Columbia River Gorge at the end of the last ice age. Register here. Accessibility notes:

This walk is about a .5 miles and includes slight elevation gain of about 50 ft., paved and unpaved trails, and two small sets of stairs.