 | Heliports: United States: Sourdough Island on Salmon Lake Heliport | |
| Heliport name: | Sourdough Island on Salmon Lake Heliport |
| Airport code (ICAO): | MT56 |
| Latitude: | 47.0999 |
| Longitude: | -113.4180 |
| Height above sea: | 3980 ft / 1213 m |
| Country: | United States - North America |
| Region: | Montana |
| City: | Seeley Lake |
| Airlines scheduled services: | no |