The hiker who, along with his daughter, was found dead on Katahdin this month died from complications of hypothermia, officials said Thursday.

The death of Tim Keiderling, 58, of Ulster Park, New York, has been ruled accidental, the Maine Office of the Chief Medical Examiner said.

His daughter Esther, 28, died from blunt force trauma, the medical examiner said June 12. Baxter State Park officials said Esther Keiderling likely slipped and fell on icy terrain and “collided with large boulders” near the Cathedral Cut-off Trail.

Baxter State Park officials had previously said the weather on Katahdin when the Keiderlings were hiking it “presented climbers with a heightened risk of hypothermia,” with temperatures in the mid-30s and wind chills around 19 degrees.

The Keiderlings were reported missing after they were last seen the morning of June 1, about half a mile from the 5,267-foot summit of Maine’s highest peak.

Crews spent nearly three days looking for the Keiderlings, with the intense search including 25 game wardens, four game warden K-9 teams, 21 Baxter State Park rangers, helicopters from the Maine Army National Guard and Maine Forest Service, and more.

Tim Keiderling’s body was found in an area near the Saddle Trail on the afternoon of June 3, more than a day after the search began.

The next afternoon, Esther Keiderling’s body was found in a boulder-filled area between the Cathedral and Saddle trails; she was located about 1,000 feet from where her father was found.

“It appears that Esther continued downhill off trail and attempted to traverse the boulder area, which was steep and snow-covered, and slid downhill until she collided with large boulders,” Baxter State Park officials said in a written statement June 12. “Based on the temperatures and other weather conditions on June 1, the snow field was likely extremely icy and almost impossible to navigate without traction foot gear such as crampons or microspikes.”

Family members have remembered Tim and Esther Keiderling as a close father-daughter duo who loved hiking and being outdoors.

“On behalf of my mother, Annemarie, and our whole family we are extremely grateful for the professional and immediate response of the search teams and the investigation that followed,” Timothy Keiderling, Esther’s brother and Tim’s son, said a written statement. “Their expertise and their care for my father and Esther were evident both during the search and in their comprehensive review over the last days that also helps give us a degree of closure.”