Fallon County, Montana Wells Summary
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Total wells
Most recent drilling
First on record
Activity status
Fallon County contains 2,770 wells on file, with top operators including Ridge Oil & Gas, LLC and MMGL MT I, LLC.
Wells in Fallon span several oil & gas fields including Cedar Creek and Pennel.
Most recent well on record: WBI Federal 121, operated by Williston Basin Interstate Pipeline Company — last updated March 2026.
Active drilling rigs · Baker Hughes snapshot, week of 2026-07-02
By basin
- 3 Williston
Drilling for
- 3 Oil
Fallon County well density
Every dot is one well — small blue dots are historic wells;
larger orange dots are wells with activity in the last 60 days.
2,770 wells plotted ·
0 active in last 60 days
Basemap © OpenStreetMap contributors · well data © Oil and Gas Information · tiles served by DynamoMap
Top Operators in Fallon County by total wells
Operators: Ridge Oil & Gas, Llc, Mmgl Mt I, Llc, Wbi Energy Transmission, Inc., Shell Oil Company, Fidelity Exploration & Production Co., Shell Western E & P Inc., Williston Basin Interstate Pipeline Company, Mon-Dak Utilities Co. & Fidelity Gas Co., Encore Operating Lp, Denbury Onshore, Llc.
Top Oil & Gas Fields intersecting Fallon County
Fields: Cedar Creek, Pennel, Cabin Creek, Lookout Butte, East, Unit, Lookout Butte, Little Beaver, Little Beaver, East, Monarch, Plevna, Pine.
Top Counties in Montana most active by total wells
Compare Fallon against the other busiest counties in Montana:
Recent wells
| Well Name | Last activity | Updates | Operator | API |
|---|---|---|---|---|
| WBI Federal 121 | 2026-03-18 | Williston Basin Interstate Pipeline Company | 25025068780000 | |
| #24 | 2026-03-18 | WBI Energy Transmission, Inc. | 25025068950000 | |
| Archer 259 | 2026-03-18 | Mon-Dak Utilities Co. & Fidelity Gas Co. | 25025068350000 | |
| TROUT 134 | 2026-03-18 | Mon-Dak Utilities Co. & Fidelity Gas Co. | 25025068370000 | |
| STATE 13 | 2026-03-18 | Mon-Dak Utilities Co. & Fidelity Gas Co. | 25025068400000 | |
| Govt 237 | 2026-03-18 | Mon-Dak Utilities Co. & Fidelity Gas Co. | 25025068300000 | |
| STATE 14 | 2026-03-18 | Mon-Dak Utilities Co. & Fidelity Gas Co. | 25025068380000 | |
| GOVT. 37 | 2026-03-18 | Mon-Dak Utilities Co. & Fidelity Gas Co. | 25025068360000 | |
| Govt 217 | 2026-03-18 | Mon-Dak Utilities Co. & Fidelity Gas Co. | 25025068310000 | |
| State 3 | 2026-03-18 | Mon-Dak Utilities Co. & Fidelity Gas Co. | 25025068280000 |
Surface Ownership Records:
