
The Umatilla River valley east of Pendleton serves as the primary corridor for settlement and transit in this portion of Umatilla County. The community of Mission acts as a central hub, surrounded by a landscape marked by its tribal and cultural heritage. This history is physically recorded through several significant sites, including the Old Agency Cem, the Agency Indian Cem, and the Tutuilla Presbyterian Indian Mission Cem. These locations, along with Saint Andrews Mission Cem, provide vital touchpoints for genealogical research and local history within the reservation.
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