PRELIMINARY: On Tuesday, March 12th, 2024, a group of five people were backcountry skiing northwest of Lost Trail Pass in the Bitterroot Mountains. One of the skiers was caught in a large avalanche on a north aspect at around 8000 ft. Other members of the group were able to locate the victim and begin first aid. They were also able to notify emergency services using a satellite device. The Ravalli County Sheriff’s Office, Ravalli County Search and Rescue, and Two Bear Air from Flathead County responded to the incident. Two Bear Air, with the assistance of Ravalli County Search and Rescue, hoisted the victim from the scene. Unfortunately, the victim had died due to injuries sustained in the avalanche before the helicopter’s arrival. Forecasters from the West Central Montana Avalanche Center visited the accident site on Wednesday, March 13th, 2024. The avalanche was approximately 250 feet wide and 3 feet deep and failed on a buried persistent weak layer.