Boulder (3U9)

Airport information: Boulder, MT, United States. Search for another airport below.

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Location and general information

FAA identifier: 3U9
FAA site number: 12274.1*A
City / state: Boulder, MT
County: Jefferson
Time zone: America/Denver
Reference point: 46°12'42.00" N
112°06'27.40" W
Elevation: 4,968 ft (estimated)
Magnetic variation: 17° E (1985)
Status: Operational
Ownership: Public, Twn of Boulder & Jefferson Co
Use: Open to the public
Airport area: 32 acres
From downtown: 2 NM south
Sectional chart: Great Falls
Activated: 07/1963

Services and facilities

Control tower: No
Attendance: Unattended
Airframe / engine repair: None / none
Transient storage: Tie-downs
ARTCC: Salt Lake City (ZLC)
Flight service: Great Falls (GTF)
1-800-WX-BRIEF
NOTAM facility: GTF
Wind indicator: Yes, unlighted
Segmented circle: Yes
Landing fee: No
Customs: No
Airport manager: Al Martini
(406) 431-7519
Last FAA inspection: 07/09/2026

FAA remarks

No snow removal.
No phone on airport.
-2 ft drainage ditch +1 ft berm west side of runway full length; 43 ft from runway 11/29 centerline.
For CD contact helena approach at 406-449-5756/5761, when approach closed contact Salt Lake ARTCC at 801-320-2568.

Source: FAA Airport Data and Information Portal (ADIP), effective October 29, 2026. View this airport on the FAA site

Airport facts

FAA identifier: 3U9
Location: Boulder, MT, United States
Elevation: 4,968 ft
Time zone: America/Denver
Coordinates: 46.21167, -112.10761

Runways

Runway	Size	Surface
11 / 29	3,675 × 72 ft	Turf, fair

Codes, elevation and runways: FAA airport data (NASR), effective 2026-10-29. Reference only, not for navigation.

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