Lopez, Washington
S31 Lopez Island
Lopez Island (S31) is a non-towered, public-use airport in Lopez, Washington, at 208.8 ft MSL. Its runway is 16/34 (2,905 by 61 ft, asphalt). Right traffic for runway 16. CTAF 128.25.
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 S31
- Location
- Lopez, Washington (San Juan County). 3 NM N of the city center
- Elevation
- 208.8 ft MSL
- Position
- 48.4839° N, 122.9377° W
- Control tower
- No, non-towered
- Sectional chart
- Seattle
- Magnetic variation
- 21° E (1985)
- Ownership
- Publicly owned, open to the public
- Attendance
- Unattended
1 runway
Runways
| Runway | Length × width | Surface | Edge lights |
|---|---|---|---|
| 16/34 | 2,905 × 61 ft | Asphalt, good condition | Medium intensity |
Runway ends and traffic pattern
| End | Pattern | Glide slope lights | Instrument | Displaced threshold | Landing distance |
|---|---|---|---|---|---|
| 16 | Right traffic | 2-light PAPI, left | None listed | None listed | Not listed |
| 34 | Not stated | 2-light PAPI, left | None listed | None listed | Not listed |
VHF
Frequencies
- CTAF
- 128.25
Weather station
- AWOS-3P S31
- 118.525
Before you go
Brief S31 in Ascent EFB.
Current weather, NOTAMs and the airport diagram for Lopez Island, 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.