Circle Town County
4U6 · Circle, MT · Non-towered · Print kneeboard · Open on the map
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Weather
METAR observed
TAF forecast
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Sun & FAA night2026-09-18 · night begins 07:39 PM
| Event | Local (MDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 06:13 AM | 12:13Z |
| Sunrise | 06:43 AM | 12:43Z |
| Sunset | 07:09 PM | 01:09Z |
| Evening civil twilight Loggable night begins | 07:39 PM | 01:39Z |
Plan a flight from 4U6
Winds aloft NOAA forecast · 3,000 to 53,000 ft
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Full reports: nearest reporting station
Advisories
NOTAMs · Loading NOTAMs…
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Airspace hazards · Checking SIGMETs and G-AIRMETs…
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Runways
RWY 12LEFT traffic
- Heading
- 131° mag · 140° true
- Dimensions
- 4,100 × 75 ft
- TPA
- 3,400 ft MSL (≈1,000 AGL) · standard
- Surface
- Asphalt
- Lights
- 2-light PAPI (left) (3°)
- CTAF
- 122.8
Enter the left downwind (heading 311°) on the 45° at 3,400 ft MSL (≈1,000 AGL).
More details — RWY 12
- Threshold elev
- 2,425 ft
- Markings
- nonprecision
- Threshold crossing height
- 25 ft
- TDZ elevation
- 2,429 ft
Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates
| Runway | Length | Your margin |
|---|---|---|
| 12/30 | 4,100 ft | |
| 03/21 | 2,280 ft |
Prefer one flat page? Full runway details for 4U6 → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the 4U6 kneeboard →
Comms & NavAids
Communication frequencies
Before taxi
Taxi & takeoff
Also
By procedure & sector (1 frequencies)
| Frequency | Used by |
|---|---|
| 305.2 | GLASGOW RCAG (LOW) |
Source: FAA NASR (current 28-day cycle).
Prefer one flat list? All 4U6 frequencies →
Charts & procedures
Airport info
Airport information
- FAA LID
- 4U6
- Coordinates
- 47.4183, -105.5609
- Elevation
- 2,441 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 · 122.3 · 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
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 under Sun & FAA night in the Weather section.
Services fuel · repairs · oxygen · attendance
- Fuel available
- 100LL
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- MAJOR
- Powerplant service
- MAJOR
- Parking
- tiedowns, hangars
- Other services
- Agricultural
Ownership & management 2 contacts
Remarks FAA · 8 notes
General
- HAS -8 FT DRAINAGE DITCH 200 FT FM RY 03/21 THLDS.
- FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.
Runways
- 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.
Lighting
- ACTVT MIRL RY 12/30 & PAPI RY 12 AND RY 30 - CTAF.
Nearby airports
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Also nearby: 7U8 Richey (23 NM) · MT58 Nelson (private) (33 NM) · MT80 Vine (private) (38 NM) · 8U6 Terry (40 NM)
About 4U6
Circle Town County (4U6) is an airport in Circle, MT, at 2,441 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 is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM in the Comms & NavAids section.
What is the longest runway at 4U6?
Circle Town County has 2 runways; the longest is 4,100 ft. See the Runways section for headings, surface, and lighting.
Where is 4U6?
Circle Town County is in Circle, MT, at an elevation of 2,441 ft MSL. Coordinates: 47.4183, -105.5609.
More about 4U6
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.
Something here wrong or out of date? Report a data problem.