Dell, Montana
4U9 Hyak Airbase
Hyak Airbase (4U9) is a non-towered, public-use airport in Dell, Montana, at 6,007 ft MSL. Its runway is 15/33 (7,002 by 75 ft, asphalt). CTAF 122.9.
FAA NASR data effective Oct 29, 2026. Not for navigation; verify with current FAA charts and the Chart Supplement.
Airport
At a glance
- Identifiers
- FAA 4U9
- Location
- Dell, Montana (Beaverhead County). 1 NM NW of the city center
- Elevation
- 6,007 ft MSL
- Position
- 44.7358° N, 112.7197° W
- Control tower
- No, non-towered
- Sectional chart
- Great Falls
- Magnetic variation
- 16° E (1985)
- Ownership
- Privately owned, open to the public
- Attendance
- Unattended
1 runway
Runways
| Runway | Length × width | Surface | Edge lights |
|---|---|---|---|
| 15/33 | 7,002 × 75 ft | Asphalt, excellent condition | Not listed |
Runway ends and traffic pattern
| End | Pattern | Glide slope lights | Instrument | Displaced threshold | Landing distance |
|---|---|---|---|---|---|
| 15 | Left traffic | None listed | None listed | None listed | Not listed |
| 33 | Left traffic | None listed | None listed | None listed | Not listed |
VHF
Frequencies
- CTAF
- 122.9
- Actvt Mirl Ry 14/32 & Papi Ry 14 - Ctaf.
Before you go
Brief 4U9 in Ascent EFB.
Current weather, NOTAMs and the airport diagram for Hyak Airbase, in the app on iPhone and iPad.
Not for navigation. Verify with current FAA charts and the Chart Supplement before flight.
Source: FAA NASR 28-day subscription, cycle effective Oct 29, 2026. Airport data changes every 28 days and NOTAMs can override it at any time.