Land area

Reservation of the Indians of Fort Peck agency in Montana (area 693)

Shape traced from the 1899 maps; approximate. Open on the map

1888
Set aside as a reservation
The 1899 record: “For these Indians the following lands: Beginning at a point in the middle of the main channel of the Missouri river opposite the mouth of Big Muddy creek”

In the record

Kept for the Indians of the Fort Peck agency as their reservation under an 1888 act, carved from the former large Montana reserve; not a cession. The area covers about 2.3 million acres in what is now Montana.

This area was not ceded. The 1899 record shows it as a reservation the nation kept, at least until the record ends in 1894.

Written from the records linked here; open any of them for its sources.

See this cession on the map

Shapes come from C. C. Royce’s 1899 maps as georeferenced by the US Forest Service. They are approximate and are not legal descriptions of land. Royce recorded land the United States treated as ceded; the shape does not show a nation’s territory.

Who is doing the work

Land return and Native-led work nearby

Confederated Salish and Kootenai Tribes (CSKT) Nation government National Bison Range restoration (about 18,800 acres) Website
Potlatch Fund Native-led Native philanthropy and grantmaking to Native individuals and Native-led organizations Give on their site Website

Native legal and land defense, nationally

Native American Rights Fund (NARF) Native-led Litigation and legal advocacy for tribal sovereignty, treaty rights, land and resources Give on their site Website
NDN Collective (LANDBACK Campaign) Native-led LANDBACK campaign (launched 2020; Mount Rushmore closure and return of Black Hills public lands), Indigenous… Give on their site Website
Indian Land Tenure Foundation (ILTF) Native-led Land recovery and control by tribes and individual Indian landowners Website
Decolonizing Wealth Project (Indigenous Earth Fund; California Tribal Land Return) Native-led Reparative philanthropy Give on their site Website

Gifts go straight to each organization; this atlas takes nothing. Listing is not endorsement: how organizations are listed.

Connections

Links marked “suggested” were matched automatically by name or date and have not yet been reviewed by a person.

Nations named for this land 1, matched by the Forest Service, under review

Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation, Montanasuggested

Located in 1

Montana

Sources

Royce, Indian Land Cessions (1899), Schedule entry dated 1888-05-01primary record
Royce’s map sheet: Montana 2 (Library of Congress)primary record
USDA Forest Service, Tribal Lands Ceded to the United States (digitized Royce maps)reference work

The record’s fields

Area number in the 1899 record: 693
Dates in the 1899 record: 1888-05-01
Kind of instrument: Act of Congress
Peoples as named in the 1899 record: Indians of Fort Peck agency
States: MT
Counties: Daniels; Roosevelt; Sheridan; Valley
Map sheets in the 1899 record: Montana 2
Geometry: Approximate shape from Royce’s 1899 maps

Research notes

geometry_role is 'cession' for every USFS feature: no field in the source distinguishes cessions from reservations.

Kind: Land area
Confidence: Medium

Correct this record