Sell Your Mineral Rights in Carter County, MT
If you own mineral rights in Carter County, you're sitting on acreage in the southeastern corner of Montana's Powder River Basin — a region that sees real oil production but is more thinly drilled than its Wyoming counterpart to the south. Values here are real, but they vary a lot depending on where your acres are and who's operating nearby. Let's figure out exactly what you have.
Est. per Acre
$50–$400
per net royalty acre
Active Wells
120+
Drilling Activity
Core Basin
Powder River Basin
Primary Formation
Primary Resource
Oil
Commodity Type
What's Actually Happening in Carter County Right Now
Carter County sits in the far southeastern corner of Montana, and its mineral rights story is quieter than some neighboring basins but not without real value. The Powder River Basin extends into this county, and operators have been drilling here — particularly targeting the Turner Sand and Niobrara formations at depths that can run 8,000 to 10,000 feet. Activity isn't what you'd call a full-blown boom, but it's steady enough that unsolicited offers from landmen and acquisition companies are a real thing here, which means someone sees value in what you own. Before you sign anything or decide to hold, it's worth knowing what the market actually looks like for Carter County acreage specifically — because it differs meaningfully from busier PRB counties like Campbell County in Wyoming just to the south.
Carter County Mineral Rights by the Numbers
~120
wells
Estimated Active Wells
$50 – $400
per acre (estimate, varies widely by location)
Estimated Value Range Per Acre
8,000 – 10,000
feet
Dominant Formation Depth
Oil
Primary Commodity
Ekalaka
(nearest larger city: Miles City, ~85 miles northwest)
County Seat
Who's Operating in Carter County
Rimrock Oil & Gas
PrivateFidelity Exploration & Production
Private (MDU Resources subsidiary)EOG Resources
EOGDevon Energy
DVNWhiting Petroleum
WLLWhat's in the Ground
Turner Sand
The Turner Sand is the most consistently targeted formation in Carter County. It's a Cretaceous-age sandstone that produces light oil and has been the primary driver of horizontal drilling activity in this part of the PRB. Well results here can be economic but are generally not at the same level as the prolific Turner plays in Campbell County, Wyoming.
Niobrara
The Niobrara is a Cretaceous shale and chalk formation that underlies much of Carter County. It's an emerging target in the Montana portion of the PRB and has drawn interest from operators testing horizontal completions. Results are more variable here than in the core of the play, making this a secondary but potentially valuable target on your acreage.
Mowry Shale
The Mowry is a deeper Cretaceous shale that has seen exploration interest in Carter County. It's considered a source rock for much of the basin's oil, and some operators have begun evaluating it as a direct target. Activity is early-stage here, so it adds speculative upside to acreage rather than near-term production value.
What to Know About Carter County
Recording Is Done Through the Carter County Clerk and Recorder in Ekalaka
All deeds, mineral conveyances, and leases are recorded at the Carter County Courthouse in Ekalaka. If you've inherited mineral rights or aren't sure if your ownership is properly documented in the county records, it's worth verifying before you enter any transaction. Title gaps are more common in eastern Montana counties than people expect, and they can affect what you're able to sell or lease.
Montana Has a Separate Surface and Mineral Estate
In Carter County, as throughout Montana, surface rights and mineral rights can be — and often are — owned separately. You may own the minerals under land you don't own the surface of, or vice versa. This is completely normal, but it's something to understand clearly before you start talking to operators or buyers.
Montana Severance Tax Applies to Production
Montana levies a severance tax on oil production, currently structured as a tiered rate depending on production volume and well age. If you're receiving royalties, this tax affects your net check. If you're evaluating a sale, it's one factor in how buyers model the economics of your acres.
Spacing Units in Carter County Can Be Large
Because the PRB in Carter County involves deeper horizontal targets, spacing units here tend to be larger — often 1,280-acre or even 2,560-acre units. This means your actual net mineral acres in a given well unit may be a smaller fraction than you'd expect, which directly affects royalty income and valuation.
Questions We Hear From Carter County Owners
I got an offer out of nowhere from a company I've never heard of. Is that normal in Carter County?
My rights are in the eastern part of the county near the South Dakota border. Are they worth anything?
My family has owned these mineral rights for decades and never received a royalty check. Does that mean nothing has been drilled?
Want to Know What Your Carter County Minerals Are Actually Worth?
You don't need to have everything figured out before you reach out. Whether you just got an offer, inherited rights you've never looked at closely, or are simply curious — the first step is a free, no-pressure conversation. We'll tell you what we know about activity in your part of the county and give you an honest read on what your acres might be worth in today's market.
Get My Free ValuationOther Powder River Basin Counties
Selling Mineral Rights in Montana: Research & Guides
Common Mistakes to Avoid When Selling Mineral Rights
Selling mineral rights for the first time is full of costly traps — from accepting low offers to misunderstanding what y…
Read article →How Long Does It Take to Sell Mineral Rights?
Selling mineral rights can take anywhere from two weeks to over a year, depending on how you sell and the condition of y…
Read article →Should You Sell or Lease Your Mineral Rights?
This article breaks down the real financial and tax differences between selling your mineral rights outright and leasing…
Read article →Get a Free Offer for Your Carter County Mineral Rights
No obligation. No commissions. We respond within one business day.