4MD9
St John Airport
St John Airport (4MD9) is a general-aviation airfield serving Owings Mills, Maryland. The field lies at 461 ft (141 m) above sea level and has a single runway of 2,600 ft (792 m), grass. Its nearest neighbour is Reservoir Airport (MD95), 6 nm W.
St John 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
- 461 ft (141 m)
- Coordinates
- 39.4806, -76.7606
- Serving
- Owings Mills
- Region
- Maryland
- Time zone
- America/New_York
Runways1 · longest 2,600 ft
The diagram shows each runway’s orientation and relative length, read from its designator — runway 02 points 20° magnetic. Threshold coordinates are not published for this field, so strips are drawn about its centre rather than where they sit on the ground. It is a diagram, not a chart to navigate by.
| Runway | Length | Width | Surface | Lighting |
|---|---|---|---|---|
| 02/20 | 2,600 ft792 m | 120 ft | Grass | — |
Nearby airfields
Runway and field data from the OurAirports public-domain dataset. Positions are ADS-B, which covers most but not all aircraft.