Chouteau County in context

Adjacent counties in the the Missouri River breaks. Chouteau County shares the Marias River–Glacier snowpack system with these neighbors.

Click any neighbor for its full county dashboard.

Snowpack & Moisture Detail

SNOTEL station-by-station read for Chouteau County. The dashboard above gives current aggregate; this section shows where the water actually is.

Chouteau County has minimal mountain snowpack of its own — water supply depends on Rocky Mountain Front runoff reaching the county via the Marias River from the north and the Missouri mainstem from the south. The Marias River, fed by Glacier-area snowpack through Lake Elwell (Tiber Reservoir), is the county’s most significant stored-water asset.

Basin Index: Marias River inflow to Lake Elwell and Missouri mainstem flow at Fort Benton set the county’s surface water baseline. Drought Monitor (valid 2026-09-08): Worst class D1 (moderate) over 38% of the county. Coverage at or worse than each class: D0 100%, D1 38%, D2 0%, D3 0%, D4 0%. Station snapshot as of September 16, 2026 — live dashboard above is current.

Two-Week Rainfall

Observed (prior 14 days) and forecast (next 14 days) · Chouteau County · as of 2026-09-17

Observed detail: 5 measurable-rain day(s) in the prior two weeks; largest single day 0.36 in.

Forecast source: NWS/NOAA api.weather.gov (days 1–7) blended with Open-Meteo gridded model (days 8–14). The next-14-day total is model-derived — NOAA quantitative precipitation forecast is precise only through ~7 days, and days 8–14 are a model blend, not an observed gauge reading.

Water Rights, Irrigation & Land Ownership

The Missouri River enters Chouteau County from the west at Fort Benton — the historic head of Missouri River steamboat navigation — and flows east through iconic breaks country to the county’s eastern boundary. The Marias River joins the Missouri near Loma, delivering Glacier-fed flow from Lake Elwell (Tiber Dam) upstream.

The Marias River carries senior irrigation rights dating to the 1880s–1890s for bench irrigators between Shelby and Loma, with Bureau of Reclamation Tiber project rights layered on top for later-vintage holders. Missouri River direct-flow rights in Chouteau County are predominantly 1880s vintage but the river’s natural variability in the breaks reach means direct diversion is unreliable in late summer without storage. The Big Sandy Creek drainage — flowing south into the Missouri — supports scattered stock water rights but is intermittent by July in most years. Groundwater is the primary stock water source for cattle on the benchlands away from the river corridors. Over-allocation on Marias River tributaries above Tiber is an ongoing issue; junior surface rights holders should not count on late-season flows.

Federal Grazing Leases

BLM and U.S. Forest Service permitted grazing on public-land allotments · Chouteau County

AUMs (BLM) and head-months (USFS) are both animal-unit-months — one animal grazing for one month, the standard measure of authorized use. Acres are BLM public acres and USFS GIS acres on the mapped allotments.

Statewide maps: BLM allotment map · Forest Service allotment map. Excludes Montana DNRC state-trust grazing leases.

Land Resources

Three independent estimates of how Chouteau County’s land is used — shown side by side, never blended

Every acreage figure below comes from an independent source that measures the land a different way. We show them side by side — and never blend reported acreage, satellite pixels and tax classifications into one unexplained number. Total county area 2,542,413 acres · land in farms 2,359,276 acres (93% of the county).

🗺  Open the interactive land map for Chouteau County →
See crops, range, irrigated fields, public land and ownership parcels drawn live on the map.

Principal crops — official vs. satellite

These columns measure different things, so they should not match. The Census counts acres actually harvested in the census year, as reported by producers; the Cropland Data Layer counts every acre the satellite saw in that crop, including fields in a crop–fallow rotation and stands not harvested. Winter wheat is the clearest example: much of the county’s wheat ground sits in fallow in any given year, so the satellite total runs well above harvested acres. CDL also over-attributes hay and forage on native range. “Withheld” means the Census suppressed the value to protect an individual operation’s privacy.

How the county’s acres classify

Three ways of counting the same ground. Census figures are producer-reported acres in farms; the satellite column is a wall-to-wall pixel classification of the whole county (so it also sees developed land, water and non-farm ground the others do not); the assessment column is the Montana Department of Revenue’s parcel-level tax classification (CAMA), which is why its cropland total tracks the Census closely while the satellite tends to run higher. Developed and open-water rows come only from the satellite. Where they disagree, no single number is “wrong” — they are measuring different things.

Irrigated land, three independent ways

The single most important acreage figure for a cattle operation, and the three sources genuinely differ. The Census counts acres actually irrigated and harvested in the census year; the Montana DOR figure is what is classified and taxed as irrigated; the DNRC mapping captures the full remote-sensed irrigated extent, including ground that carries irrigation but was idle or in another use that year — so it usually reads highest. We publish all three rather than pick one.

What each estimate means

• USDA Census of Agriculture — producer-reported, the official record. Highly credible, but taken every five years and suppressed in counties where a value would identify a single operation.
• Satellite (Cropland Data Layer) — USDA’s annual, wall-to-wall satellite classification. Complete county coverage every year, but it infers crops from imagery, so it mislabels some ground and over-calls hay and forage on native range.
• Tax / assessment — Montana Department of Revenue parcel-level classification from the CAMA assessment roll (2026 tax year), aggregated from the Montana State Library cadastral. Parcel- and ownership-based; a land classification, not an annual crop report.

Sources: USDA NASS Census of Agriculture 2022 (Quick Stats); USDA Cropland Data Layer 2023 (CropScape zonal statistics, USDA-NASS); Montana Department of Revenue CAMA assessment acreage via the MSDI cadastral parcels layer (tax year 2026); Montana DNRC Statewide Irrigation dataset. Prepared by Dirk Adams with the assistance of AI.

Local Help

Verified contacts and official destinations for Chouteau County — not a directory dump, just where to actually call

Extension, USDA, market, brand and diagnostic links go to the official Montana source; the DNRC office and phone are the specific regional office serving this county. Provider directories (veterinarians, feed dealers) will be added only once a repeatable verification standard is in place. Prepared by Dirk Adams with the assistance of AI.

Production & Sales

Operation character, hay base, and how cattle reach market from Chouteau County.

Cattle production

Chouteau County is quintessential Montana cow-calf country — most operations are family-scale cow-calf units running 100–400 head on a combination of deeded breaks range and leased state land. The Missouri River breaks provide summer range with calves typically weaned in October and backgrounded on hay ground through winter. Dryland farming (spring wheat, durum) is integrated on most operations, providing cash flow and homegrown feed grain. The county has no major USFS allotment presence — nearly all grazing is on private and state lease ground.

Hay & winter feed

Native grass and alfalfa-grass mix hay dominates; most irrigated hay ground is along the Marias River valley between Loma and Big Sandy. First cutting runs late June to early July, with a marginal second cutting in August on better-watered ground. Dryland hay quality is highly variable and producers regularly supplement with purchased alfalfa from Cascade County or the Hi-Line. In drought years, securing winter feed tonnage by August is critical given limited local surplus.

Logistics · sale barns & trucking

Fort Benton serves as the county seat and commercial center but has no operating sale barn; cattle move to Great Falls (Cascade County) for auction or via video/direct sales. US-87 is the primary north–south truck route connecting to Great Falls (60 miles south) and Havre (75 miles north). Highway 80 east connects to Big Sandy and US-2. Truck access into the Missouri breaks can be limited by spring mud on gravel county roads — plan for delays in April shipments.

Licensed Processing Plants

No federally inspected or state-inspected processing plant currently operates in Chouteau County — the nearest licensed plants are listed below

Meat from federally inspected and state-inspected plants can be sold; custom-exempt plants are not listed here. Verified August 2026 against the USDA FSIS Meat, Poultry & Egg Product Inspection Directory and the Montana Department of Livestock state plant list (Jan 2026). Grants of inspection change — call before you haul.