Columbia River

Umatilla River

Mile 289.0 Left Bank

Source Data

Left bank: Umatilla River

Memorial Contribution Documented by Robert Heacock (1957–2025), from Wind Hard from the West: The Lewis and Clark Expedition on the Snake and Columbia Rivers (2015), used by permission of his family.

Our Partners

Follow the research

New findings, additions, and corrections from the archive. One email a month, no noise.