David Olson with Boise National Forest said the person was killed Monday when one of the planes crashed. Further details on the death were not immediately available.
Olson said early reports indicated one of the planes was able to land at an airstrip in Landmark and the pilot was able to walk away. He was airlifted to a hospital.
The other aircraft crashed about a mile from the airstrip 30 miles east of Cascade. The crash caused a small fire.
Two air ambulances, the Valley County Sheriff’s Office and firefighting crews with the Boise National Forest responded to the scene.