Cave Junction, Oregon
3S4 Illinois Valley
Illinois Valley (3S4) is a non-towered, public-use airport in Cave Junction, Oregon, at 1,394 ft MSL. Its runway is 18/36 (4,807 by 60 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 3S4
- Location
- Cave Junction, Oregon (Josephine County). 4 NM SW of the city center
- Elevation
- 1,394 ft MSL
- Position
- 42.1036° N, 123.6824° W
- Control tower
- No, non-towered
- Sectional chart
- Klamath Falls
- Magnetic variation
- 18° E (1985)
- Ownership
- Publicly owned, open to the public
- Attendance
- M-F 0800-1700
1 runway
Runways
| Runway | Length × width | Surface | Edge lights |
|---|---|---|---|
| 18/36 | 4,807 × 60 ft | Asphalt, good condition | Medium intensity |
Runway ends and traffic pattern
| End | Pattern | Glide slope lights | Instrument | Displaced threshold | Landing distance |
|---|---|---|---|---|---|
| 18 | Left traffic | 2-light PAPI, left | None listed | 125 ft | 4,682 ft |
| 36 | Left traffic | 2-light PAPI, left | None listed | None listed | 4,682 ft |
VHF
Frequencies
- CTAF
- 122.9
Before you go
Brief 3S4 in Ascent EFB.
Current weather, NOTAMs and the airport diagram for Illinois Valley, 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.