Grand Lake St Marys Seaplane Base
Daylight today(Sep 2, 2026, local time)
About 13h 3m of daylight. Civil twilight (dawn/dusk) approximates the FAA definition of night for logging and currency. Times are computed and approximate — verify with official sources.
About Grand Lake St Marys Seaplane Base
Grand Lake St. Marys Seaplane Base is a public use seaplane base located five nautical miles (9 km) southwest of the central business district of St. Marys, a city in Auglaize County, Ohio, United States. It is owned by the Ohio Division of Parks & Recreation and is located on Grand Lake St. Marys, a lake and state park in Ohio. The airport is a significant meeting place for the Ohio Seaplane Pilots Association.
Summary from Wikipedia licensed under CC BY-SA.
Live traffic nearby
Aircraft currently within ~40 nm, from live ADS-B. Positions are approximately real-time — not for navigation.
Live ADS-B by adsb.lol & the OpenSky Network. Not for navigation.
Map
Runway centrelines, navaids and overlapping airspace. Tiles © OpenStreetMap contributors. Reference only — not for navigation.
Runways (1)
| Runway | Length | Width | Surface | Lighting | Status |
|---|---|---|---|---|---|
| 09 / 27 | 7,000 ft / 2,134 m | 4000 ft | Water | Unlit | Open |
Nearby airports
Great-circle distance and true bearing from Grand Lake St Marys Seaplane Base.
Frequently asked questions
Where is Grand Lake St Marys Seaplane Base located?
Grand Lake St Marys Seaplane Base is seaplane base located in St Marys, United States, at an elevation of 871 ft (265 m).
How many runways does Grand Lake St Marys Seaplane Base have?
Grand Lake St Marys Seaplane Base has 1 runway, the longest being 7,000 ft / 2,134 m.
What time zone is Grand Lake St Marys Seaplane Base in?
Grand Lake St Marys Seaplane Base is in the America/New York time zone (UTC-04:00).
What is the magnetic variation at Grand Lake St Marys Seaplane Base?
The magnetic variation (declination) at Grand Lake St Marys Seaplane Base is approximately 6.3° W, per the World Magnetic Model. Variation changes slowly over time — always use the current value charted for navigation.
What airports are near Grand Lake St Marys Seaplane Base?
The nearest airport to Grand Lake St Marys Seaplane Base is Lakefield Airport (KCQA), about 4.7 nm to the sw, followed by Neil Armstrong Airport and Heitman Field.
Is the information on this page suitable for flight planning?
No. Grand Lake St Marys Seaplane Base data here is for reference and training only — not for navigation. Always consult official sources and current charts before any flight.