K7A4
Foster Field
Foster Field (K7A4) is a general-aviation airfield serving Apple River, Illinois. The field lies at 990 ft (302 m) above sea level and has a single runway of 2,996 ft (913 m), asphalt and lit. Its nearest neighbour is Heller Airport (22IL), 11 nm WSW.
Foster Field 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
- 990 ft (302 m)
- Coordinates
- 42.4664, -90.1694
- Serving
- Apple River
- Region
- Illinois
- Time zone
- America/Chicago
Runways1 · longest 2,996 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 |
|---|---|---|---|---|
| 18/36 | 2,996 ft913 m | 30 ft | Asphalt | Lit |
Nearby airfields
Runway and field data from the OurAirports public-domain dataset. Positions are ADS-B, which covers most but not all aircraft.