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The Pioneer Fire located in the Boise National Forest near Idaho City, ID began on Jul. 18, 2016 and the cause is under investigation. The Pioneer Fire has consumed 96,469 acres.

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Ash covers Oregon cities, wildfire smoke chokes US West

A growing Oregon wildfire covered parts of Portland's metropolitan area Tuesday with ash and forced the shutdown of a lengthy stretch of highway through the state's scenic Columbia River Gorge.