Amtrak trains between the Twin Cities and the West Coast are rolling again following two days of cancelations due to heavy snow and avalanches that had blocked tracks in Montana's mountain passes for the past three days.

"Today's departures of the Empire Builder from Chicago, Portland and Seattle will operate across the full route," said Amtrak spokesman Marc Magliari in an emailed statement.

The Empire Builder operates one westbound from Union Depot in St. Paul to Seattle and Portland and one eastbound train to Chicago daily.

"Thanks to the skill and science deployed by BNSF Railway, the route through Marias Pass in Montana will be open for our trains to safely use," Magliari said.

Amtrak operates on tracks owned by BNSF Railway.

A major snowstorm dumped as much as 3 feet of snow in northwestern Montana between Sunday night and Tuesday. Trains were unable to get through Marias Pass on the southern boundary of Glacier National Park, forcing Amtrak to curtail service. Service between the Twin Cities and Chicago was not affected

Passengers affected by the service outage were rebooked or offered refunds, Magliari said. Riders with questions can call Amtrak at 1-800-USA-RAIL.