A former Allegheny County man was killed this weekend by an avalanche in Wyoming. Kenneth Goff, 36, was leading a group of skiers through the backcountry near Grand Teton National Park when they accidentally triggered a snow slide.

Officials in Wyoming confirmed the death of a 36-year-old skier following an avalanche at a mountain pass over the weekend. The avalanche occurred on Saturday at Togwotee Pass in Teton County, which is northeast of Jackson.

According to the U.S. Department of Agriculture’s website, a person trapped under the snow following an avalanche might not have more than 20 to 30 minutes to survive. The department also said there are about 100,000 avalanches annually in the U.S., resulting in an average of 28 deaths.