Grand Lake St Marys Seaplane Base
O12 has 1 runway. The longest is 9/27 at 7,000 ft × 4,000 ft (water).
FAA NASR data, cycle 2026-09-03
O12 field elevation is 871 ft MSL. The standard traffic pattern altitude at O12 is 1,870 ft MSL (1,000 ft AGL). Fuel available at O12: 100LL.
FAA NASR data, cycle 2026-09-03
Check O12 against your personal minimums, plan a route to it, and see the best runway for the current wind — free.
No, O12 is a non-towered airport.
O12 has 1 runway (9/27). The longest runway is 7,000 feet.
O12 uses the standard traffic pattern altitude of 1,000 feet AGL — about 1,870 feet MSL at a field elevation of 871 feet.
Yes. O12 (Grand Lake St Marys Seaplane Base) has 100LL available. Call the field for hours, self-serve availability and price.
O12 (Grand Lake St Marys Seaplane Base) has a field elevation of 871 feet MSL.
O12 (Grand Lake St Marys Seaplane Base) is located in St Marys, OH.