Airport information
- FAA LID
- 4U6
- Coordinates
- 47.4186, -105.5620
- Elevation
- 2,426 ft MSL
- Magnetic variation
- 9E
- Sectional chart
- BILLINGS
- Airport use
- Public
- Control tower
- No
- Weather station
- AWOS-2 · 119.025 · ☎ 406-485-3760
- ARTCC
- SALT LAKE CITY (ZLC)
- Flight service (FSS)
- GREAT FALLS · 1-800-WX-BRIEF
- NOTAM facility
- GTF
- Attendance
- MON-FRI 0800-1700
- Beacon
- white-green (SS-SR)
- Segmented circle
- Yes
- Wind indicator
- lighted
- Activated
- 1940/04
- Distance from city
- 1 E
Weather
METAR observed
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TAF forecast
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Sun & FAA night 2026-06-22
| Event | Local (MDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 04:25 AM | 10:25Z |
| Sunrise | 05:05 AM | 11:05Z |
| Sunset | 09:03 PM | 03:03Z |
| Evening civil twilight Loggable night begins | 09:43 PM | 03:43Z |
Plan a flight from 4U6
Night operations
- Airport lighting
- SEE RMK
- Rotating beacon
- white-green · SS-SR
- Pilot-controlled lighting
- ACTVT MIRL RY 12/30 & PAPI RY 12 AND RY 30 - CTAF. on 122.8 — Chart Supplement ↗
Runway lighting aids — 12: 2-light PAPI (left) · 30: 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 03 · 039°
- Pattern
- left (turns left)
- TPA
- 3,400 ft MSL (≈1,000 AGL)
- CTAF
- 122.8
Enter the left downwind for Rwy 03 at 3,400 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 03/21
2,280 ft × 195 ft · Turf (Poor)- Heading
- 039° mag · 48° true
- Threshold elev
- 2,426 ft
- Traffic pattern
- Left
- TDZ elevation
- 2,426 ft
- Heading
- 220° mag · 229° true
- Threshold elev
- 2,422 ft
- Traffic pattern
- Left
- TDZ elevation
- 2,426 ft
Runway 12/30
4,100 ft × 75 ft · Asphalt (Poor)- Heading
- 131° mag · 140° true
- Threshold elev
- 2,425 ft
- Markings
- nonprecision
- VGSI
- 2-light PAPI (left) (3°)
- Traffic pattern
- Left
- Threshold crossing height
- 25 ft
- TDZ elevation
- 2,429 ft
- Heading
- 311° mag · 320° true
- Threshold elev
- 2,441 ft
- Markings
- nonprecision
- VGSI
- 2-light PAPI (left) (3°)
- Traffic pattern
- Left
- Threshold crossing height
- 21 ft
- TDZ elevation
- 2,441 ft
| Runway | Length | Your margin |
|---|---|---|
| 03/21 | 2,280 ft | |
| 12/30 | 4,100 ft |
Communication frequencies
Tower & ground
| ASOS/AWOS | 119.025 |
| CTAF | 122.8 |
| UNICOM | 122.8 |
| Flight service | 126.85 (LOW) |
By procedure & sector (1 frequencies)
| Frequency | Used by |
|---|---|
| 305.2 | GLASGOW RCAG (LOW) |
Source: FAA NASR (current 28-day cycle).
Chart Supplement FAA A/FD
Open PDF ↗Preview Chart Supplement
VFR sectional
Services
- Fuel available
- 100LL
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- MAJOR
- Powerplant service
- MAJOR
- Parking
- tiedowns, hangars
- Other services
- Agricultural
Ownership & management
Remarks FAA
- HAS -8 FT DRAINAGE DITCH 200 FT FM RY 03/21 THLDS.
- FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.
- ACTVT MIRL RY 12/30 & PAPI RY 12 AND RY 30 - CTAF.
- CLSD WINTER MONTHS.
- 03/21 THRS MKD WITH RED CONES.
- RWY IS RUF, WITH LONG GRASS, RWY EDGES ARE NOT MKD.
- TRANSVERSE CRACKS AT 100 FT INTVLS WITH SGFNT WID AND DPT.
- UNUSBL IN WET WEATHER.
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 4U6 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 4U6
Circle Town County Airport (4U6) is an airport in Circle, MT, at 2,426 ft MSL. It has 2 runways, the longest 4,100 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 4U6, refreshed from the Aviation Weather Center and FAA NASR.
Does 4U6 have a control tower?
No. Circle Town County Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at 4U6?
Circle Town County Airport has 2 runways; the longest is 4,100 ft. See the Runways tab for headings, surface, and lighting.
Where is 4U6?
Circle Town County Airport is in Circle, MT, at an elevation of 2,426 ft MSL. Coordinates: 47.4186, -105.5620.
Fly out of 4U6 often?
Save 4U6 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.