Porthill, Idaho
1S1 Eckhart Intl
Eckhart Intl (1S1) is a non-towered, public-use airport in Porthill, Idaho, at 1,758 ft MSL. Its runway is 15/33 (3,650 by 175 ft, turf). 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 1S1
- Location
- Porthill, Idaho (Boundary County). 0 NM W of the city center
- Elevation
- 1,758 ft MSL
- Position
- 48.9905° N, 116.5021° W
- Control tower
- No, non-towered
- Sectional chart
- Great Falls
- Magnetic variation
- 20° E (1985)
- Ownership
- Publicly owned, open to the public
- Attendance
- Unattended
1 runway
Runways
| Runway | Length × width | Surface | Edge lights |
|---|---|---|---|
| 15/33 | 3,650 × 175 ft | Turf, good 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
- 122.8
- UNICOM
- 122.8
Before you go
Brief 1S1 in Ascent EFB.
Current weather, NOTAMs and the airport diagram for Eckhart Intl, 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.