Airport information
- FAA LID
- M46
- Coordinates
- 45.8529, -106.7090
- Elevation
- 3,426 ft MSL
- Magnetic variation
- 13E
- Sectional chart
- BILLINGS
- Airport use
- Public
- Control tower
- No
- Weather station
- AWOS-3PT · 118.525 · ☎ 406-748-3849
- ARTCC
- SALT LAKE CITY (ZLC)
- Flight service (FSS)
- GREAT FALLS
- NOTAM facility
- GTF
- Attendance
- ON CALL
- Beacon
- white-green (SS-SR)
- Segmented circle
- Yes
- Wind indicator
- lighted
- Activated
- 1990/11
- Distance from city
- 3 SW
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 | 05:17 AM | 11:17Z |
| Sunset | 09:01 PM | 03:01Z |
| Evening civil twilight Loggable night begins | 09:39 PM | 03:39Z |
Plan a flight from M46
Night operations
- Airport lighting
- SEE RMK
- Rotating beacon
- white-green · SS-SR
- Pilot-controlled lighting
- ACTVT PAPI 06 & 24 - CTAF; MIRL RWY 06/24 PRESET LOW INTST DUSK-0100; AFT 0100 ACTVT - CTAF. on 122.7 — Chart Supplement ↗
Runway lighting aids — 06: 2-light PAPI (left) · 24: 2-light PAPI (left).
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.
Traffic pattern
- Landing
- Rwy 06 · 062°
- Pattern
- left (turns left)
- TPA
- 4,400 ft MSL (≈1,000 AGL)
- CTAF
- 122.7
Enter the left downwind for Rwy 06 at 4,400 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 06/24
5,100 ft × 75 ft · Asphalt (Good)- Heading
- 062° mag · 75° true
- Threshold elev
- 3,428 ft
- Markings
- nonprecision
- VGSI
- 2-light PAPI (left) (3°)
- Traffic pattern
- Left
- Threshold crossing height
- 24 ft
- TDZ elevation
- 3,428 ft
- Heading
- 242° mag · 255° true
- Threshold elev
- 3,383 ft
- Markings
- nonprecision
- VGSI
- 2-light PAPI (left) (3°)
- Traffic pattern
- Left
- Threshold crossing height
- 24 ft
- TDZ elevation
- 3,412 ft
| Runway | Length | Your margin |
|---|---|---|
| 06/24 | 5,100 ft |
Communication frequencies
Tower & ground
| ASOS/AWOS | 118.525 |
| CTAF | 122.7 |
| UNICOM | 122.7 |
| Flight service | 126.85 (LOW) |
By procedure & sector (1 frequencies)
| Frequency | Used by |
|---|---|
| 305.2 | MILES CITY RCAG (LOW) |
Source: FAA NASR (current 28-day cycle).
Chart Supplement FAA A/FD
Open PDF ↗Preview Chart Supplement
VFR sectional
Services
- Parking
- tiedowns
Ownership & management
Remarks FAA
- HILL 1550' FM RY 24 END 600' LEFT & 93' ABOVE RY THR.
- 700 FT POWER PLANT STACKS 4.5 NM NE OF ARPT.
- PHONE AVAIL ON ARPT.
- COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -34C.
- FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.
- ACTVT PAPI 06 & 24 - CTAF; MIRL RWY 06/24 PRESET LOW INTST DUSK-0100; AFT 0100 ACTVT - CTAF.
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 M46 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 M46
Colstrip Airport (M46) is an airport in Colstrip, MT, at 3,426 ft MSL. It has 1 runway, the longest 5,100 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for M46, refreshed from the Aviation Weather Center and FAA NASR.
Does M46 have a control tower?
No. Colstrip Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at M46?
Colstrip Airport has 1 runway; the longest is 5,100 ft. See the Runways tab for headings, surface, and lighting.
Where is M46?
Colstrip Airport is in Colstrip, MT, at an elevation of 3,426 ft MSL. Coordinates: 45.8529, -106.7090.
Fly out of M46 often?
Save M46 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.