Hyak Airbase
4U9 · Dell, MT · Non-towered · Print kneeboard · Open on the map
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Weather
METAR observed
TAF forecast
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Sun & FAA night2026-11-02 · night begins 05:49 PM
| Event | Local (MST) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 06:39 AM | 13:39Z |
| Sunrise | 07:10 AM | 14:10Z |
| Sunset | 05:18 PM | 00:18Z |
| Evening civil twilight Loggable night begins | 05:49 PM | 00:49Z |
Plan a flight from 4U9
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…
Temporary flight restrictions · Checking for TFRs…
Runways
RWY 15LEFT traffic
- Heading
- 143° mag · 159° true
- Dimensions
- 7,002 × 75 ft
- TPA
- 7,000 ft MSL (≈1,000 AGL) · standard
- Surface
- Asphalt
- CTAF
- 122.9
Enter the left downwind (heading 323°) on the 45° at 7,000 ft MSL (≈1,000 AGL).
More details — RWY 15
- Threshold elev
- 5,958 ft
- Markings
- basic
Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates
| Runway | Length | Your margin |
|---|---|---|
| 15/33 | 7,002 ft |
Prefer one flat page? Full runway details for 4U9 → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the 4U9 kneeboard →
Comms & NavAids
Communication frequencies
Taxi & takeoff
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
DLN 113.00
| NavAid | Type | Freq · ch | Range | Radial / Dist magnetic |
|---|---|---|---|---|
| DLN · Dillon | VOR/DME | 113.00 · 77X | High | r175° / 31.6 NM |
Prefer one flat list? All 4U9 frequencies →
Charts & procedures
Airport info
Airport information
- FAA LID
- 4U9
- Coordinates
- 44.7358, -112.7197
- Elevation
- 6,007 ft MSL
- Magnetic variation
- 16E
- Sectional chart
- GREAT FALLS
- Airport use
- Public
- Control tower
- No
- ARTCC
- SALT LAKE CITY (ZLC)
- Flight service (FSS)
- GREAT FALLS · 122.3 · 1-800-WX-BRIEF
- NOTAM facility
- GTF
- Attendance
- UNATNDD
- Segmented circle
- No
- Wind indicator
- yes
- Activated
- 1944/02
- Distance from city
- 1 NW
Night operations
- Airport lighting
- SEE RMK
- Pilot-controlled lighting
- ACTVT MIRL RY 14/32 & PAPI RY 14 - CTAF. on 122.9 — Chart Supplement ↗
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
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- NONE
- Powerplant service
- NONE
- Parking
- tiedowns
Ownership & management 2 contacts
Remarks FAA · 6 notes
General
- SNOW REMOVAL IRREGULAR.
- DEER ON & INVOF ARPT.
- FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.
- AFLD SFC COND UNMONITORED.
- LANDING FEES FOR ACFT 12500 LBS AND OVER. PPR.
Lighting
- ACTVT MIRL RY 14/32 & PAPI RY 14 - CTAF.
Nearby airports
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Also nearby: U00 Leadore (27 NM) · U41 Dubois Municipal (41 NM) · 24ID Flying Z Ranch (private) (44 NM) · 18MT Fish Ranch (private) (44 NM) · 32MT Vbob (private) (45 NM)
About 4U9
Hyak Airbase (4U9) is an airport in Dell, MT, at 6,007 ft MSL. It has 1 runway, the longest 7,002 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 4U9, refreshed from the Aviation Weather Center and FAA NASR.
Does 4U9 have a control tower?
No. Hyak Airbase is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM in the Comms & NavAids section.
What is the longest runway at 4U9?
Hyak Airbase has 1 runway; the longest is 7,002 ft. See the Runways section for headings, surface, and lighting.
Where is 4U9?
Hyak Airbase is in Dell, MT, at an elevation of 6,007 ft MSL. Coordinates: 44.7358, -112.7197.
More about 4U9
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 4U9 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.