Six snowmobilers missing in the snowy Colorado mountains called for help Monday and reported they were hungry but alive, authorities said.

Crews were on their way to meet the six, who are all from New Mexico, said Barbara Smith, a spokeswoman for the Conejos County Sheriff's Department.

The snowmobilers called 911 from an isolated and snowbound train station and said they were cold but otherwise all right, Smith said. They had been missing since Friday amid heavy snow in the area.

The snowmobilers had been missing near 10,222-foot Cumbres Pass just north of the Colorado-New Mexico border. The area is about 200 miles south of Denver and 60 miles northwest of Taos, N.M.

The search had been hindered by heavy snow and bad roads. As much as 4 feet of snow fell in the area since Friday, the National Weather Service said.

Smith said they took refuge at Osier Station, a small wooden building that serves as summertime stop on the Cumbres & Toltec Scenic Railroad, a tourist line.

The snowmobilers were Jason Groen, 36, his wife, Shannon, 31, and daughter, Aspen, 14, said Betty Groen, Jason's stepmother. Groen said they were snowmobiling with Mike Martin, one of Groen's employees, his wife, Missy, and their son, Jessie, 13. The families had left on a snowmobile trip Friday morning and expected to be back that evening, Betty Groen said.

Two skiiers remained missing Monday. Searchers in a helicopter and on snowmobiles took advantage of a break in the weather to resume looking for them at Wolf Creek Pass, about 40 miles northwest of Cumbres Pass.

The men, missing since Saturday, were in their mid-20s and their car had New Mexico license plates, but their names had not been released.