Hyak was established around 1915 at the eastern portal of the Snoqualmie Pass Milwaukee Road Railroad tunnel.

citation

Wikipedia contributors. (2023, July 26). Hyak, Washington. In Wikipedia, The Free Encyclopedia. Retrieved February 18, 2024, from https://en.wikipedia.org/w/index.php?title=Hyak,_Washington&oldid=1167176655

More Sites in Washington (archive.org) This rockhounding page no longer exists but a partial copy was captured by the Internet Archive in March 2013. Most images and map links are no longer valid but you can get some tips on a few rockhounding sites.

Snoqualmie Tunnel (Wikipedia) 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 three miles (5 km) south of the pass, which is used by Interstate 90, on the border between King County and Kittitas County. It is 11,894 feet (2.253 mi; 3.625 km) long and is at an approximate elevation of 2,600 feet (790 m) above sea level, just north of Keechelus Lake. Its east portal is at Hyak.

Hyak, Washington (Wikipedia) Hyak is an unincorporated community located on Snoqualmie Pass in Kittitas County, Washington. It is located within the Snoqualmie Pass CDP.