Honest Cattle · Prairie County
Water Rights
Water Rights & Land Ownership
Prairie County straddles the Yellowstone main-stem in eastern Montana — Terry is the county seat, on the Yellowstone. The Powder River joins the Yellowstone within the county at the Custer line. O’Fallon Creek drains the south. About 3,700 active rights, mostly stock and small irrigation along the Yellowstone benches.
3,724Active water rights
Irrigation & StockPrimary uses
1,737 mi²County area
42L · 42M · 40PDNRC basins
Active rights pulled live from DNRC WRQS on 2026-06-01. Prairie spans seven basins: 40D/40E/40P (N margin), 42J/42K/42L/42M (Yellowstone main and Powder tribs).
Prairie County Watershed Map
Rivers Yellowstone R. Powder R. O’Fallon Cr. Irrigation
Search Prairie County water rights
DNRC WRQSOwner, priority, abstract — pre-filter on basin 42L or 42M. DNRC WaterMapperYellowstone main-stem, Powder R., O’Fallon Cr. diversions. Montana CadastralParcel boundaries & geocodes. GWIC MapperWells & aquifer data.
- Water right format:
- 42M 12345 00 (Yellowstone) · 42J/K Powder side · 40P N margin.
- Primary basins:
- 42L Yellowstone main · 42M Yellowstone lower · 42J/K Powder tribs · 40D/40E/40P N margin.
- DNRC regional office:
- Miles City Regional Office, 406-234-0241.
- Clerk & Recorder:
- Prairie County, 406-635-5575.
Quick links
Data sources: Montana DNRC, MSL/DOR Cadastral, MBMG GWIC. Active rights pulled live from DNRC WRQS on 2026-06-01. Informational only.