one of the longest railroad tunnels in the United States, located in central Washington about 60 miles (100 km) east of Seattle. It carries a line of the Burlington Northern Sante Fe railroad through the Cascade Range between Berne (on the east) and Scenic. It is 41,078 feet (7.8 miles 【12.5 km】) long. Constructed from 1925 to 1929, it replaced a shorter tunnel a few miles to the north.