NPS / Jacob W. Frank

YELLOWSTONE NATIONAL PARK, WY — A single-vehicle accident in Yellowstone National Park killed 13-year-old Nathaniel Robert Ullom of Elizabeth, Colorado.

In an email from Yellowstone National Park’s public affairs office, officials confirmed that a rental motorhome was involved in a single-vehicle accident on South Entrance Road near Lewis Falls at about 5:30 p.m. The South Entrance Road was closed for a number of hours until all patients could be extricated and the vehicle removed. The details of the accident are unknown at this time.

Grand Teton National Park and Jackson Hole Fire/EMS were also dispatched to provide assistance. Three passengers were on board the motorhome, including the victim, his twin brother Phillip Ullom III, and their father Phillip Ullom. Nathaniel was declared deceased on-scene. His father Phillip was transported by ground ambulance to St. John’s Medical Center in Jackson. Phillip Ullom III was air-flighted by via Air Idaho Rescue helicopter to Eastern Idaho Regional Medical Center with serious injuries.