U91
Grasmere Airport
Grasmere Airport (U91) is a general-aviation airfield serving Grasmere, Idaho. The field lies at 5,134 ft (1,565 m) above sea level and has a single runway of 2,750 ft (838 m), dirt. Its nearest neighbour is Owyhee Airport (K10U), 29 nm SSW.
Grasmere Airport is a smaller field, so Alārium does not attribute movements to it directly — but aircraft flying near it appear on the live map like any other, at their real altitude and on their real track.
Location
- Elevation
- 5,134 ft (1,565 m)
- Coordinates
- 42.3733, -115.8795
- Serving
- Grasmere
- Region
- Idaho
- Time zone
- America/Boise
Runways1 · longest 2,750 ft
The diagram is drawn from published threshold coordinates, so each runway sits where it actually sits — true bearings, true separations, true lengths. Runway widths are exaggerated against length, which at true proportion would draw a hairline. It is a diagram, not a chart to navigate by.
| Runway | Length | Width | Surface | Lighting |
|---|---|---|---|---|
| 05/23 | 2,750 ft838 m | 150 ft | Dirt | — |
Nearby airfields
Runway and field data from the OurAirports public-domain dataset. Positions are ADS-B, which covers most but not all aircraft.