Black Mountain Oil
Operator of record for 52 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: Black Mountain Oil Co. · Black Mountain Oil Corp.
At a glance
Black Mountain Oil is the operator of record for 52 catalogued U.S. oil & gas wells in 2 states. None is listed as active, 48 (92%) are plugged & abandoned. Its largest concentration is in California, with 51 wells (98% of its portfolio).
Wells operated
52
Active
0
Plugged
48
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| California | 51 |
| Montana | 1 |
Well mix
- Oil wells
- 9
- Gas wells
- 21
- Shut-in
- 0
- Active share
- 0%
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Claim Black Mountain Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Black Mountain Oil operate?
Black Mountain Oil's catalogued wells are spread across 2 states: California (51) and Montana (1). Its 51 California wells are 0.0% of the 242,471 catalogued in that state — its largest share of any state. Counts cover only states whose registries WellCensus has ingested with operator names; wells in Nebraska and Texas (location indexes) and in states without a registry ingest are not yet attributed to any operator.
How many of Black Mountain Oil’s wells are active, plugged or orphaned?
0% of Black Mountain Oil's catalogued wells are active, 29 percentage points below the national share of 29%. 92% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Black Mountain Oil operate?
By product class, 9 (17%) are oil wells and 21 (40%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Farmer-B<>26-87 in Musselshell, MT at 1,300 ft. The wells listed below sit in Musselshell (MT), Yolo (CA), Sutter (CA) and Kern (CA). State filings spell the name 2 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Black Mountain Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Farmer-B<>26-87 | 25-065-21640 | Plugged & abandoned | Other type | Musselshell, MT | Black Mountain Oil Corp. | 1,300 ft |
| Sugarfield-Cache Creek 1-35 | 04-113-20972 | Plugged & abandoned | Other type | Yolo, CA | Black Mountain Oil Co. | — |
| University 1-1 | 04-113-20917 | Plugged & abandoned | Gas | Yolo, CA | Black Mountain Oil Co. | — |
| Knights Landing 3-13 | 04-113-20924 | Plugged & abandoned | Other type | Yolo, CA | Black Mountain Oil Co. | — |
| Armour Road 1-5 | 04-101-20417 | Other status | Oil | Sutter, CA | Black Mountain Oil Co. | — |
| Marchant 1-6 | 04-101-20416 | Other status | Oil | Sutter, CA | Black Mountain Oil Co. | — |
| Wheeler Road 61X-16 | 04-029-83536 | Plugged & abandoned | Oil | Kern, CA | Black Mountain Oil Co. | — |
| North River Garden Farms 1-14 | 04-113-20983 | Plugged & abandoned | Other type | Yolo, CA | Black Mountain Oil Co. | — |
| River Garden Farms 5 | 04-113-20920 | Plugged & abandoned | Other type | Yolo, CA | Black Mountain Oil Co. | — |
| Sugarfield-Cache Creek 2-3 | 04-113-20966 | Plugged & abandoned | Gas | Yolo, CA | Black Mountain Oil Co. | — |
| Sugarfield-Cache Creek 6-34 | 04-113-21058 | Plugged & abandoned | Gas | Yolo, CA | Black Mountain Oil Co. | — |
| University 1-36 | 04-113-20956 | Plugged & abandoned | Other type | Yolo, CA | Black Mountain Oil Co. | — |
Deepest first where depth is published. See all 52 wells →
Frequently asked questions
How many wells does Black Mountain Oil operate?
Black Mountain Oil is the operator of record for 52 catalogued oil & gas wells, with the largest concentration in California (51). Only wells in states WellCensus has ingested are counted.
How many of Black Mountain Oil's wells are still active?
0 of Black Mountain Oil's catalogued wells are active; 48 are plugged & abandoned.
In which states does Black Mountain Oil operate wells?
Black Mountain Oil is the operator of record for wells in California (51) and Montana (1).
Does Black Mountain Oil operate mostly oil or gas wells?
9 of Black Mountain Oil's catalogued wells are oil wells and 21 are gas wells; the rest are injection, service or unclassified wells.
What is Black Mountain Oil's deepest well?
Among wells with a published depth, Farmer-B<>26-87 in Musselshell, MT is the deepest at 1,300 ft.
Where Black Mountain Oil's wells are
About this data
Source: State oil & gas regulator registries (operator of record as filed, exact-normalized across states) plus the USGS United States Documented Orphaned Well Database (2026), as published October 10, 2026 — WellCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: WellCensus, “Black Mountain Oil — well portfolio”, https://wellcensus.com/operators/black-mountain-oil-8179 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).