Culbertson, Montana
S85 Big Sky Fld
Big Sky Fld (S85) is a non-towered, public-use airport in Culbertson, Montana, at 1,953 ft MSL. Its runway is 08/26 (3,800 by 60 ft, asphalt). CTAF 122.8.
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 S85
- Location
- Culbertson, Montana (Roosevelt County). 1 NM NE of the city center
- Elevation
- 1,953 ft MSL
- Position
- 48.1536° N, 104.5041° W
- Control tower
- No, non-towered
- Sectional chart
- Billings
- Magnetic variation
- 13° E (1985)
- Fuel
- 100LL
- Ownership
- Publicly owned, open to the public
- Attendance
- Unattended
1 runway
Runways
| Runway | Length × width | Surface | Edge lights |
|---|---|---|---|
| 08/26 | 3,800 × 60 ft | Asphalt, good condition | Medium intensity |
Runway ends and traffic pattern
| End | Pattern | Glide slope lights | Instrument | Displaced threshold | Landing distance |
|---|---|---|---|---|---|
| 08 | Left traffic | None listed | None listed | None listed | Not listed |
| 26 | Left traffic | 2-light PAPI, left | None listed | None listed | Not listed |
VHF
Frequencies
- CTAF
- 122.8
- Actvt Mirl Ry 08/26 & Papi Ry 26 - Ctaf.
- UNICOM
- 122.8
Weather station
- AWOS-3 S85
- 120.000
Before you go
Brief S85 in Ascent EFB.
Current weather, NOTAMs and the airport diagram for Big Sky Fld, 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.