Foss River

---

title: "Foss River" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["rivers-of-washington-(state)", "rivers-of-king-county,-washington"] topic_path: "general/rivers-of-washington-state" source: "https://en.wikipedia.org/wiki/Foss_River" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::data[format=table title="Infobox river"]

Field	Value
name	Foss River
map_size	300
pushpin_map	Washington#USA
pushpin_map_size	300
pushpin_map_caption	Location of the mouth of the Foss River in Washington
subdivision_type1	Country
subdivision_name1	United States
subdivision_type2	State
subdivision_name2	Washington
subdivision_type4	County
subdivision_name4	King
source1	Confluence of West and East Forks
source1_location	Cascade Range
source1_coordinates
mouth	Skykomish River
mouth_coordinates
mouth_elevation	1024 ft
::

| name = Foss River | name_native = | name_native_lang = | name_other = | name_etymology = | image = | image_caption = | map = | map_size = 300 | map_caption = | pushpin_map = Washington#USA | pushpin_map_size = 300 | pushpin_map_caption= Location of the mouth of the Foss River in Washington | subdivision_type1 = Country | subdivision_name1 = United States | subdivision_type2 = State | subdivision_name2 = Washington | subdivision_type3 = | subdivision_name3 = | subdivision_type4 = County | subdivision_name4 = King | subdivision_type5 = | subdivision_name5 = | length = | width_min = | width_avg = | width_max = | depth_min = | depth_avg = | depth_max = | discharge1_location= | discharge1_min = | discharge1_avg = | discharge1_max = | source1 = Confluence of West and East Forks | source1_location = Cascade Range | source1_coordinates= | source1_elevation = | mouth = Skykomish River | mouth_location = | mouth_coordinates = | mouth_elevation = 1024 ft | progression = | river_system = | basin_size = | tributaries_left = | tributaries_right = | custom_label = | custom_data = | extra = The Foss River is a stream in the U.S. state of Washington. It has two main forks, the East Fork Foss River and the West Fork Foss River. The main stem is formed by the confluence of the two forks. The river and its forks rise near in the Alpine Lakes Wilderness area of Mount Baker-Snoqualmie National Forest in the Cascade Mountains and flows generally north, joining the Tye River to form the South Fork Skykomish River. The Foss River's waters eventually empty into Puget Sound near Everett via the Skykomish River and Snohomish River.

East Fork

The East Fork Foss River originates at , from the meltwater of Lynch Glacier on the north slope of Mount Daniel. It gathers tributaries from glaciers on the north slope of Mount Hinman as well as tributaries flowing from the lakes of Necklace Valley such as Lake Ilswoot, Locket Lake, Opal Lake, La Bohn Lakes, Alturas Lake, and others. The East Fork Foss River flows generally north, joining the West Fork to form the main stem Foss River.

West Fork

The West Fork Foss River originates at , from a small glacier and lake on the north side of Iron Cap Mountain. It flows north through a series of lakes including Otter Lake, Delta Lake, and Trout Lake. Its numerous tributaries likewise flow through many lakes in the heart of the Alpine Lakes Wilderness. Leaving the lakes region the West Fork flows generally north, joining the East Fork to form the main stem Foss River.

References

References

1. {{GNIS. 1519714. Foss River
2. General course info from USGS topographic maps accessed via the "GNIS in Google Map" feature of the USGS [[Geographic Names Information System]] website.
3. {{GNIS. 1519096. East Fork Foss River
4. {{GNIS. 1527945. West Fork Foss River

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::