Airport information
- FAA LID
- 3U4
- Coordinates
- 45.6066, -106.2745
- Elevation
- 2,909 ft MSL
- Magnetic variation
- 13E
- Sectional chart
- BILLINGS
- Airport use
- Public
- Control tower
- No
- ARTCC
- SALT LAKE CITY (ZLC)
- Flight service (FSS)
- GREAT FALLS
- NOTAM facility
- GTF
- Attendance
- UNATNDD
- Segmented circle
- No
- Wind indicator
- yes
- Activated
- 1964/10
- Distance from city
- 1 NW
Weather
METAR observed
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TAF forecast
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Sun & FAA night 2026-06-21
| Event | Local (MDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 04:38 AM | 10:38Z |
| Sunrise | 05:16 AM | 11:16Z |
| Sunset | 08:58 PM | 02:58Z |
| Evening civil twilight Loggable night begins | 09:36 PM | 03:36Z |
Plan a flight from 3U4
Night operations
- Pilot-controlled lighting
- Usually keyed on CTAF 122.8 — confirm the click sequence in the Chart Supplement ↗
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.
Traffic pattern
- Landing
- Rwy 13 · 132°
- Pattern
- left (turns left)
- TPA
- 3,900 ft MSL (≈1,000 AGL)
- CTAF
- 122.8
Enter the left downwind for Rwy 13 at 3,900 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 13/31
3,830 ft × 95 ft · GRVL-DIRT (Good)- Heading
- 132° mag · 145° true
- Threshold elev
- 2,902 ft
- Traffic pattern
- Left
- Approach obstacle
- Tree, 52 ft, 114 ft from threshold, 33 ft R of centerline — 2:1 slope to clear · penetrates the 20:1 visual approach surface
- Heading
- 312° mag · 325° true
- Threshold elev
- 2,904 ft
- Traffic pattern
- Left
- Approach obstacle
- Tree, 52 ft, 125 ft from threshold, 10 ft L of centerline — 2:1 slope to clear · penetrates the 20:1 visual approach surface
| Runway | Length | Your margin |
|---|---|---|
| 13/31 | 3,830 ft |
Communication frequencies
Tower & ground
| CTAF | 122.8 |
| UNICOM | 122.8 |
Source: FAA NASR (current 28-day cycle).
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
Remarks FAA
- VEHICLES & HORSES INVOF RY.
- 100' LIGHTED ANTENNA 1/2 MILE SW OF ARPT ON HILL.
- NUMEROUS TREES ON E SIDE OF RY FULL LENGTH TO +60 FT IN TRANSITIONAL SURFACES.
- RY 31 -8' TERRAIN DROPOFF BEGINNING 35' FM EOR WITH DENSE BRUSH.
- RY 13 HAS -10 FT TERRAIN DROPOFF BEGINNING 15 FT FM EOR WITH DENSE BRUSH CREEK.
- RY 13/31 1 FT TO 2 FT DIRT BERM ON EDGE OF RY AND THLDS.
- FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.
- PROVIDE OWN ROPES.
- 406-477-6625 AT NIGHT OR 406-983-4500.
- MUDDY WHEN WET.
- RY 31 NUMEROUS TREES IN BOTH APCH SFCS WITHIN 180' OF RY ENDS.
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 3U4 in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.
About 3U4
Saint Labre Mission Airport (3U4) is an airport in Ashland, MT, at 2,909 ft MSL. It has 1 runway, the longest 3,830 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 3U4, refreshed from the Aviation Weather Center and FAA NASR.
Does 3U4 have a control tower?
No. Saint Labre Mission Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at 3U4?
Saint Labre Mission Airport has 1 runway; the longest is 3,830 ft. See the Runways tab for headings, surface, and lighting.
Where is 3U4?
Saint Labre Mission Airport is in Ashland, MT, at an elevation of 2,909 ft MSL. Coordinates: 45.6066, -106.2745.
Fly out of 3U4 often?
Save 3U4 as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.