Snoqualmie Tunnel

{{Short description|Tunnel in Washington, United States}}

{{Use mdy dates|date=April 2025}}

{{Infobox tunnel

| name = Snoqualmie Tunnel

| image = Snoqualmietunnel.jpg

| image_size = 210

| alt =

| caption = East portal at Hyak in 2006

| official_name =

| other_name =

| line =

| location = Hyak, Washington

| coordinates = {{nowrap|{{Coord|47.3947|N|121.3963|W|display=it}}}}

| os_grid_ref =

| status =

| system =

| crosses = Cascade Range,
near Snoqualmie Pass

| start =

| end =

| stations =

| startwork = 1912

| opened = 1914, {{Time ago|1914}}

| closed =

| rebuilt =

| reopened =

| owner =

| operator = Milwaukee Road

| traffic =

| character = Rail until 1980,
now non-motorized trail

| engineer =

| construction =

| length = {{convert|2.2526|mi|3}}

| linelength =

| tracklength =

| notrack = Single

| gauge = Standard

| el = Yes

| speed =

| hielevation = {{convert|2600|ft|-1}}

| lowelevation =

| height =

| width =

| depth_below_water =

| shipping_clearance_above =

| grade =

| map = {{maplink |type=point |frame=yes |plain=yes |frame-align=center |frame-lat=47.3947 |frame-long=-121.3963 |zoom=9}}

| extra =

}}

The Snoqualmie Tunnel is a former railroad tunnel near Snoqualmie Pass in the U.S. state of Washington, located east of Seattle. The tunnel crosses the Cascade Range about {{convert|3|mi|0|spell=in}} south of the pass, which is used by Interstate 90, on the border between King County and Kittitas County. It is {{convert|11894|ft|mi km|3}} long and is at an approximate elevation of {{convert|2600|ft|-1}} above sea level, just north of Keechelus Lake.{{cite book|last1=Washington Geological Survey|title=Bulletin - Washington Geological Survey, Issues 16-18|date=1913|publisher=The Survey|page=259|url=https://books.google.com/books?id=0iM0AQAAMAAJ&q=Snoqualmie+Tunnel+feet+long|accessdate=13 April 2017}} Its east portal is at Hyak.

The tunnel was originally constructed for the Chicago, Milwaukee, St. Paul and Pacific Railroad in the early 1910s and was abandoned in 1980. It now serves as part of a rail trail in Iron Horse State Park, known officially as the Palouse to Cascades State Park Trail. The trail was formerly known as the John Wayne Pioneer Trail and commonly called the Iron Horse Trail.{{cite news |url=http://www.seattlepi.com/news/article/Rolling-on-the-old-Milwaukee-rail-line-1283289.php |newspaper=Seattle Post-Intelligencer|last=Johnston |first=Greg |title=Rolling on the old Milwaukee rail line |date=August 27, 2008 |accessdate=January 9, 2017}}{{cite news |last=Paul |first=Crystal |date=May 17, 2018 |title=Former John Wayne Pioneer Trail renamed Palouse to Cascades State Park Trail |url=https://www.seattletimes.com/life/outdoors/former-john-wayne-pioneer-trail-renamed-palouse-to-cascades-state-park-trail/ |work=The Seattle Times |accessdate=May 17, 2018}} A major renovation to the walls, ceiling, and path were completed in July 2011 after a two-year closure.{{cite web|last=Dolstad|first=Mackenzie|title=Grand Re-opening of Snoqualmie Pass Tunnel|url=http://mtsgreenway.org/our-work/communities/20th-anniversary-trek/20th-anniversary-trek-community-events/grand-re-opening-of-snoqualmie-pass-tunnel|publisher=Mountains to Sound Greenway|accessdate=8 June 2011}}{{cite news|title=Snoqualmie Tunnel gives cyclists, riders cool new link |url=http://www.seattletimes.com/seattle-news/snoqualmie-tunnel-gives-cyclists-riders-cool-new-link/|newspaper=Seattle Times |last=Mapes |first=Lynda V. |date=July 6, 2011 |accessdate=January 8, 2017}}