west to Rockdale, at an approximate elevation of , more than below the pass. The rail line was abandoned in 1980, and the tunnel is presently a multi-use trail for bicyclists and hikers, part of Iron Horse State Park. During tunnel construction, an improved wagon road was built over the pass. Near the original rail line, the Sunset Highway was opened through the pass in 1915. In 1927, the road over the pass became U.S. Route 10; it began to be plowed and kept open during winter in 1931. By 1933, the first alpine ski hill was cleared at Snoqualmie Pass, and U.S. 10 was finally paved in 1934. In 1946, tunnel engineer Ole Singstad proposed the construction a tunnel under Snoqualmie Pass to avoid the most treacherous section of the route. On June 24, 1946, seven players on the Spokane Indians minor league baseball team, and their manager, were killed when their bus veered through a guard rail on the Snoqualmie Pass Highway and plunged down a 500-foot embankment and into a ravine. In 1969, construction of U.S. 10's replacement, Interstate 90, began across the pass. Since 1991, the Mountains to Sound Greenway Trust has acted to protect the scenic value of the I-90 corridor over Snoqualmie Pass. See also Iron Horse State Park White Pass Stevens Pass Walter Steinhart Footnotes References Further reading External links Snoqualmie Pass road conditions History of Hyak Snowfall History Transportation in King County, Washington Landforms of King County, Washington Landforms of Kittitas County, Washington Rail mountain passes of the United States Chicago, Milwaukee, St. Paul and Pacific Railroad Mountain passes of Washington (state) Mountain passes of the Cascades Transportation in Kittitas County, Washington Yakima River