Alton Bay Seaplane Base
B18 has 1 runway. The longest is 1/19 at 2,600 ft × 100 ft (water).
FAA NASR data, cycle 2026-09-03
B18 field elevation is 504 ft MSL. The standard traffic pattern altitude at B18 is 1,500 ft MSL (1,000 ft AGL).
FAA NASR data, cycle 2026-09-03
Check KB18 against your personal minimums, plan a route to it, and see the best runway for the current wind — free.
No, B18 is a non-towered airport.
B18 has 1 runway (1/19). The longest runway is 2,600 feet.
B18 uses the standard traffic pattern altitude of 1,000 feet AGL — about 1,500 feet MSL at a field elevation of 504 feet.
B18 (Alton Bay Seaplane Base) has a field elevation of 504 feet MSL.
B18 (Alton Bay Seaplane Base) is located in Alton Bay, NH.