Three snowmobilers were partially buried by debris when they were caught in an avalanche north of Granby on Saturday.

The slide happened on Gravel Mountain near Grand Lake just before 2:30 p.m. The Colorado Avalanche Information Center said that three or four people were caught in the avalanche, but were able to get out on their own or with the help of bystanders. It is believed to have been triggered by a snowmobile.

The victim was traveling on a terrain feature known as The Nose near Silverton, Colo., when the avalanche occurred on Thursday, officials said.

A snowboarder in Colorado's backcountry was killed in an avalanche west of Silverton on Thursday.According to the Colorado Avalanche Information Center, a skier and snowboarder were traveling in the Middle Fork of Mineral Creek drainage when they were caught in an avalanche in the terrain known as The Nose.

As one man became buried, the other tried to locate him by using his avalanche rescue transceiver, officials with the Colorado Avalanche Information Center (CAIC) said.

In a separate incident, four people caught in another avalanche escaped serious injury, Colorado officials say.

A snowboarder was killed in an avalanche in the mountains of southwestern Colorado on Thursday, the fourth person to die in an avalanche in the U.S. West this week after a string of winter storms.