OR Archives - Lewis & Clark Research Database https://research.lewisandclarktrust.org/treaty-location/or/ A digital archive of treaties, documents, artwork, and 360° trail panoramas from the Corps of Discovery Thu, 19 Feb 2026 13:47:35 +0000 en-US hourly 1 Treaty with the Umatilla, 1888 https://research.lewisandclarktrust.org/treaties/treaty-with-the-umatilla-1888/ Thu, 19 Feb 2026 13:47:35 +0000 https://research.lewisandclarktrust.org/treaties/treaty-with-the-umatilla-1888/ Land cession by the Umatilla. Region: Oregon 2. Counties: Umatilla, Union. Present-Day Tribes Confederated Tribes of the Umatilla Reservation, Oregon

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]]> Land cession by the Umatilla. Region: Oregon 2. Counties: Umatilla, Union.

Present-Day Tribes

  • Confederated Tribes of the Umatilla Reservation, Oregon

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]]> Treaty with the Nez Percé, 1873 https://research.lewisandclarktrust.org/treaties/treaty-with-the-nez-perc-1873/ Thu, 19 Feb 2026 13:47:31 +0000 https://research.lewisandclarktrust.org/treaties/treaty-with-the-nez-perc-1873/ Land cession by the Nez Percé. Region: Oregon 2, Washington 2. Counties: Asotin, Wallowa. Associated dates: 1873-06-16, 1875-06-10. Present-Day Tribes Nez Perce Tribe of Idaho Nez Perce Tribe, Idaho Citations…

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]]> Land cession by the Nez Percé. Region: Oregon 2, Washington 2. Counties: Asotin, Wallowa. Associated dates: 1873-06-16, 1875-06-10.

Present-Day Tribes

  • Nez Perce Tribe of Idaho
  • Nez Perce Tribe, Idaho

Citations

2 Hodge 65-67

Tiller 395-96

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]]> Treaty with the Shoshoni (Western bands), 1863 https://research.lewisandclarktrust.org/treaties/treaty-with-the-shoshoni-western-bands-1863/ Thu, 19 Feb 2026 13:47:27 +0000 https://research.lewisandclarktrust.org/treaties/treaty-with-the-shoshoni-western-bands-1863/ Land cession by the Shoshoni (Western bands). Region: Utah 1, Nevada, California 2, Oregon 1, Idaho. Covering 36 counties across CA, ID, NV, OR, UT. Present-Day Tribes Northwestern Band of…

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]]> Land cession by the Shoshoni (Western bands). Region: Utah 1, Nevada, California 2, Oregon 1, Idaho. Covering 36 counties across CA, ID, NV, OR, UT.

Present-Day Tribes

  • Northwestern Band of Shoshoni Nation of Utah (Washakie)
  • Te-Moak Tribe of Western Shoshone Indians of Nevada

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]]> Treaty with the Indians on the Oregon Coast, 1855 https://research.lewisandclarktrust.org/treaties/treaty-with-the-indians-on-the-oregon-coast-1855/ Thu, 19 Feb 2026 13:47:25 +0000 https://research.lewisandclarktrust.org/treaties/treaty-with-the-indians-on-the-oregon-coast-1855/ Land cession by the Indians on the Oregon Coast. Region: Oregon 1. Covering 6 counties across OR. Associated dates: 1855-11-09, 1875-03-03.

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]]> Land cession by the Indians on the Oregon Coast. Region: Oregon 1. Covering 6 counties across OR. Associated dates: 1855-11-09, 1875-03-03.

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]]> Treaty with the Confederated Bands of Willamette valley, 1857 https://research.lewisandclarktrust.org/treaties/treaty-with-the-confederated-bands-of-willamette-valley-1857/ Thu, 19 Feb 2026 13:47:25 +0000 https://research.lewisandclarktrust.org/treaties/treaty-with-the-confederated-bands-of-willamette-valley-1857/ Land cession by the Confederated Bands of Willamette valley. Region: Oregon 1. Counties: Polk, Yamhill. Present-Day Tribes Confederated Tribes of the Grand Ronde Community of Oregon Confederated Tribes of the…

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]]> Land cession by the Confederated Bands of Willamette valley. Region: Oregon 1. Counties: Polk, Yamhill.

Present-Day Tribes

  • Confederated Tribes of the Grand Ronde Community of Oregon
  • Confederated Tribes of the Siletz Indians of Oregon
  • Confederated Tribes of the Warm Springs Reservation of Oregon

Citations

Tiller 671; Tiller 676

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]]> Treaty with the Confederated Tribes of middle Oregon, 1855 https://research.lewisandclarktrust.org/treaties/treaty-with-the-confederated-tribes-of-middle-oregon-1855/ Thu, 19 Feb 2026 13:47:24 +0000 https://research.lewisandclarktrust.org/treaties/treaty-with-the-confederated-tribes-of-middle-oregon-1855/ Land cession by the Confederated Tribes of middle Oregon. Region: Oregon 1. Counties: Jefferson, Wasco. Associated dates: 1855-06-25, 1894-06-06. Present-Day Tribes Confederated Tribes of the Warm Springs Reservation of Oregon

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]]> Land cession by the Confederated Tribes of middle Oregon. Region: Oregon 1. Counties: Jefferson, Wasco. Associated dates: 1855-06-25, 1894-06-06.

Present-Day Tribes

  • Confederated Tribes of the Warm Springs Reservation of Oregon

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]]> Treaty with the Coast tribes of Oregon, 1855 https://research.lewisandclarktrust.org/treaties/treaty-with-the-coast-tribes-of-oregon-1855/ Thu, 19 Feb 2026 13:47:24 +0000 https://research.lewisandclarktrust.org/treaties/treaty-with-the-coast-tribes-of-oregon-1855/ Land cession by the Coast tribes of Oregon. Region: Oregon 1. Counties: Clatsop, Columbia, Tillamook. Present-Day Tribes Confederated Tribes of the Coos, Lower Umpqua and Siuslaw Indians of Oregon Confederated…

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]]> Land cession by the Coast tribes of Oregon. Region: Oregon 1. Counties: Clatsop, Columbia, Tillamook.

Present-Day Tribes

  • Confederated Tribes of the Coos, Lower Umpqua and Siuslaw Indians of Oregon
  • Confederated Tribes of the Grand Ronde Community of Oregon
  • Confederated Tribes of the Siletz Indians of Oregon
  • Coquille Indian Tribe, Oregon
  • Cow Creek Band of Umpqua Tribe of Indians, Oregon

Citations

Suttles 182; Suttles 182,186-88; Suttles 186-87; Suttles 187-87

Tiller 664, 671; Tiller 664, 667; Tiller 664, 668; Tiller 664, 670; Tiller 664, 676

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]]> Treaty with the Calapooia and Confederated Bands of Willamette valley, 1855 https://research.lewisandclarktrust.org/treaties/treaty-with-the-calapooia-and-confederated-bands-of-willamette-valley-1855/ Thu, 19 Feb 2026 13:47:23 +0000 https://research.lewisandclarktrust.org/treaties/treaty-with-the-calapooia-and-confederated-bands-of-willamette-valley-1855/ Land cession by the Calapooia, Confederated Bands of Willamette valley. Region: Oregon 1. Covering 15 counties across OR. Present-Day Tribes Confederated Tribes of the Grand Ronde Community of Oregon Confederated…

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]]> Land cession by the Calapooia, Confederated Bands of Willamette valley. Region: Oregon 1. Covering 15 counties across OR.

Present-Day Tribes

  • Confederated Tribes of the Grand Ronde Community of Oregon
  • Confederated Tribes of the Siletz Indians of Oregon
  • Confederated Tribes of the Warm Springs Reservation of Oregon

Citations

1 Hodge 645; Tiller 671; Tiller 676

Waldman 125-26

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]]> Treaty with the Cayuse et al., 1855 https://research.lewisandclarktrust.org/treaties/treaty-with-the-cayuse-et-al-1855/ Thu, 19 Feb 2026 13:47:23 +0000 https://research.lewisandclarktrust.org/treaties/treaty-with-the-cayuse-et-al-1855/ Land cession by the Cayuse, Umatilla, Walla-walla. Region: Oregon 1, Washington 1. Covering 10 counties across OR, WA. Present-Day Tribes Confederated Tribes of the Umatilla Indian Reservation, Oregon Confederated Tribes…

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]]> Land cession by the Cayuse, Umatilla, Walla-walla. Region: Oregon 1, Washington 1. Covering 10 counties across OR, WA.

Present-Day Tribes

  • Confederated Tribes of the Umatilla Indian Reservation, Oregon
  • Confederated Tribes of the Umatilla Reservation, Oregon

Citations

1 Hodge 224

Tiller 678

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