Wallowa River - Northeast Oregon How do you beat the smoke when it has been lingering for nearly a month? Head to the water, or more specifically, build like a beaver. That is exactly what we did on a late July summer day on the Wallowa River. We had folks join us from all over the Blue Mountain Ecoregion, including Halfway, Baker City, and Walla Walla. The goal: build a post-less beaver dam that mimics the appearance and, more importantly, the function of a beaver dam. Post-