Hyak is an unincorporated community located on Snoqualmie Pass in Kittitas County, Washington.

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

Originally a train station, the community began to grow in the 1930s when the railroad built a world class ski area.

[3] Hyak is located two miles (3 km) east of the summit of Snoqulamie Pass at an elevation of 2,600 feet (790 m).

In 1915, Hyak replaced Laconia as the main train station on Snoqualmie Pass.