A Utah snowmobiler, 49-year-old Jason Lyman of Mona, was killed Saturday after being buried by an avalanche in Summit County, says Lieutenant Andrew Wright of the Summit County Sheriff’s Office.

The avalanche occurred east of Coalville just before 1:30 p.m. Lyman’s avalanche beacon notified officials of the avalanche, though two friends actually pulled him from the snow, according to a news release from Summit County Sheriff’s Department.

The friends administered CPR to Lyman for about 40 minutes until a Department of Public Safety helicopter arrived. He was flown to a hospital in Evanston, Wyo., where he died.

Authorities estimate the avalanche was 500 to 600 feet wide and 4 to 10 feet deep.

Including Lyman, at least four have died in avalanches this year in Utah. The last recorded avalanche-related fatality before those deaths was in January 2016.