Grand Lake St Marys Seaplane Base runways

Grand Lake St Marys Seaplane Base (O12) in St Marys, OH has 1 runway, the longest 09/27 at 7,000 ft (water). Dimensions, headings, lighting, and instrument approaches for each below.

All of Grand Lake St Marys Seaplane Base — runways, frequencies, charts and live weather

Runway 09/27

7,000 ft × 4000 ft · WATER

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Headings shown are true (magnetic variation unavailable).

Frequently asked

What is the longest runway at O12?

Grand Lake St Marys Seaplane Base has 1 runway; the longest is runway 09/27 at 7,000 ft.

What surface are O12's runways?

Grand Lake St Marys Seaplane Base's runway is water.

More about O12

Runway data from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources.