A hiker’s fall down a sheer slope near Lake Clark, with possibly life-threatening injuries, led to the rescue of his entire four-person group Sunday night by an Alaska Air National Guard helicopter.

In a Tuesday dispatch, Alaska State Troopers say they were notified of 34-year-old Port Angeles, Wash. native Brian Dodd’s injuries, when he fell on a scree slope atop Copper Mountain, shortly before 8 p.m. Sunday.

“The four-person hiking party reported that they were unable to move (Dodd) and communications were maintained via a Park Service radio,” troopers wrote. “(Alaska Wildlife Troopers) responded to the area via fixed-wing aircraft and located the hikers who were stranded on a vertical cliff face.”

The Guard chopper, dispatched by the 11th Air Force’s Rescue Coordination Center, reached the scene at about 10:50 p.m., recovering the party by roughly 11:30 p.m. One of the other hikers, 29-year-old Grand Canyon, Ariz. resident Kenton Hotsko, also suffered an injury during the rescue.

Troopers say the entire party was flown to Providence Alaska Medical Center in Anchorage. Dodd is listed in fair condition Wednesday morning and Hotsko is listed in critical condition.