Big Sandy, Montana
3U8 Big Sandy
Big Sandy (3U8) is a non-towered, public-use airport in Big Sandy, Montana, at 2,698.5 ft MSL. It has 2 runways: 06/24 (3,570 by 60 ft, asphalt), 13/31 (2,100 by 100 ft, turf). Published pattern altitude 800 ft AGL (about 3,499 ft MSL). 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 3U8
- Location
- Big Sandy, Montana (Chouteau County). 1 NM S of the city center
- Elevation
- 2,698.5 ft MSL
- Position
- 48.1634° N, 110.1143° W
- Pattern altitude
- 800 ft AGL
- Control tower
- No, non-towered
- Sectional chart
- Great Falls
- Magnetic variation
- 16° E (1985)
- Fuel
- 100LL
- Ownership
- Publicly owned, open to the public
- Attendance
- Unattended
2 runways
Runways
| Runway | Length × width | Surface | Edge lights |
|---|---|---|---|
| 06/24 | 3,570 × 60 ft | Asphalt, excellent condition | Medium intensity |
| 13/31 | 2,100 × 100 ft | Turf, good condition | Not listed |
Runway ends and traffic pattern
| End | Pattern | Glide slope lights | Instrument | Displaced threshold | Landing distance |
|---|---|---|---|---|---|
| 06 | Left traffic | 2-light PAPI, left | None listed | None listed | Not listed |
| 24 | Left traffic | 2-light PAPI, left | None listed | None listed | Not listed |
| 13 | Left traffic | None listed | None listed | None listed | Not listed |
| 31 | Left traffic | None listed | None listed | None listed | Not listed |
VHF
Frequencies
- CTAF
- 122.9
- Actvt Mirl Rwy 06/24 - Ctaf.
Before you go
Brief 3U8 in Ascent EFB.
Current weather, NOTAMs and the airport diagram for Big Sandy, 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.