 | Airports: United States: Hayes Emergency Airstrip | |
| Airport name: | Hayes Emergency Airstrip |
| Airport code (ICAO): | SD21 |
| Latitude: | 44.3708 |
| Longitude: | -101.0090 |
| Height above sea: | 1986 ft / 605 m |
| Country: | United States - North America |
| Region: | South Dakota |
| City: | Hayes |
| Airlines scheduled services: | no |