Airports 501 to 550
Tipella Airport
Mount Saint Helens Forest Learning Center Helipad
Sisters Islets Lighthouse Helipad
Strait of Georgia, British Columbia, Canada — 196 km (106 nm) NW
Central Washington Hospital Heliport
Port Alberni/Sproat Lake Seaplane Base
Sproat Lake Tanker Base Heliport
Pianosa Flying Farm Ultralight Flightpark
Chrome Island Lightstation Helipad
Chrome Island, British Columbia, Canada — 206 km (111 nm) NW