The Snoqualmie Pass Tunnel is a very thrilling hiking or biking adventure.The tunnel is cold, damp, and dark, and is approximately 2 miles long.

The survey for the tunnel was completed in 1908. In 1911 work had begun on Tunnel No 50. The tunnel was completed on January 1, 1915 for $2,000,000.00. On January 15, 1915 the first eastbound train passed through the tunnel. At 11,888 feet the Snoqualmie Pass Tunnel was the longest tunnel on the Milwaukee Road's system. It took 700 men to compete the tunneling.
The process was started from the west portal and the east portal. The road crews met in the middle on August 4, 1914. The actual name of the trail is Iron Horse State Park and John Wayne Pioneer Trail.The trail starts at Cedar Falls and continues to Vantage on the Columbia river for a distant of 109 miles. There are 5 train tunnels on the trail between Cedar Falls and Thorp. Lake Easton State Park is approximately 16 miles east of Snoqualmie Pass.