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Heritage Station Museum Umatilla County has a rich history covering just over 150 years. Theres a lot to learn about this area that so many have called home. Umatilla County Historical Society Heritage Station Museum The Umatilla County Historical Society a 501c3 organization was established in 1974 and each years Board of Directors has built upon the vision of its 100 charter members in providing the means to document and share local history. An historic journalPioneer Trails was first published in 1976.