On February 23, 1910, the two Great Northern Railway trains, the Seattle Express local passenger train No. 25 and Fast Mail train No. 27, were stalled on the tracks at the Cascade Tunnel Station on Stevens Pass because of a heavy snow storm and avalanches. Then on March 1, six days later, another avalanche pushed both trains down into the Tye River Valley, thus burying the train cars in snow and debris. The Wellington Disaster killed ninety-six people - thirty-five passengers and sixty-one railroad employees - which made the Wellington avalanche one of the worst .