Two people were killed over the weekend in separate avalanches in Idaho and Utah as dangerous backcountry conditions continue across the West.

A snowmobiler died Sunday in Idaho after triggering an avalanche north of the Keg Springs Trailhead in the Centennial Mountains near Island Park, according to Fremont County Search and Rescue.

A group of four people visiting from the Midwest was caught in the slide. One snowmobiler was buried "fairly deeply" and did not survive. Two others were caught but were not injured, according to the Gallatin National Forest Avalanche Center in Idaho.

Avalanche debris can be seen in Idaho's Island Park region on Sunday. Photo by R. Searle/Gallantin National Forest Avalanche Center

On the same day, another snowmobiler was killed in Utah in the upper reaches of Caribou Basin in Snake Creek Canyon north of Midway, according to the Utah Avalanche Center.