Airport information
- FAA LID
- 3U9
- Coordinates
- 46.2116, -112.1060
- Elevation
- 4,968 ft MSL
- Magnetic variation
- 17E
- Sectional chart
- GREAT FALLS
- Airport use
- Public
- Control tower
- Yes
- ARTCC
- SALT LAKE CITY (ZLC)
- Flight service (FSS)
- GREAT FALLS
- NOTAM facility
- GTF
- Attendance
- UNATNDD
- Segmented circle
- Yes
- Wind indicator
- yes
- Activated
- 1963/07
- Distance from city
- 2 S
Weather
METAR observed
Loading current weather…
TAF forecast
Loading forecast…
Sun & FAA night 2026-06-20
| Event | Local (MDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 04:58 AM | 10:58Z |
| Sunrise | 05:36 AM | 11:36Z |
| Sunset | 09:23 PM | 03:23Z |
| Evening civil twilight Loggable night begins | 10:02 PM | 04:02Z |
Loggable night (§1.1)
10:02 PM → 04:58 AM
Night currency (§61.57)
10:23 PM → 04:36 AM
Plan a flight from 3U9
Runway 11/29
3,675 ft × 72 ft · Turf (Fair) 11
- Heading
- 113° mag · 130° true
- Markings
- nonstandard
- Traffic pattern
- Left
29
- Heading
- 293° mag · 310° true
- Markings
- nonstandard
- Traffic pattern
- Left
Nearby navigation aids
| NavAid | Type | Freq | Radial / Dist magnetic |
|---|---|---|---|
| HIA · Whitehall | VORTAC | 113.70 | r349° / 21.2 NM |
| HLN · Helena | VORTAC | 117.70 | r179° / 24.6 NM |
| CPN · Coppertown | VOR-DME | 111.60 | r052° / 28.8 NM |
Chart Supplement FAA A/FD
Open PDF ↗Preview Chart Supplement
VFR sectional
Services
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- NONE
- Powerplant service
- NONE
- Parking
- tiedowns
Ownership & management
Owner
TWN OF BOULDER & JEFFERSON CO
COUNTY COURTHOUSE BOX H, BOULDER, MT
406-225-4025
Manager
AL MARTINI
PO BOX 2, BOULDER, MT
(406) 431-7519
Remarks FAA
- NO SNOW REMOVAL
- NO PHONE ON AIRPORT.
- -2 FT DRAINAGE DITCH +1 FT BERM WEST SIDE OF RY FULL LENGTH; 43 FT FM RY 11/29 CNTRLN.
- FOR CD CTC HELENA APCH AT 406-449-5756/5761, WHEN APCH CLSD CTC SALT LAKE ARTCC AT 801-320-2568.
- RY 11/29 THLDS & EDGES MARKED WITH WHITE CONES
- HAS 1% TO 3% UPHILL GRADIENT FROM RY 29 END TO RY 11 END.
Nearby airports
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open 3U9 in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator.