Boulder River (Washington)

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Boulder River
Boulder River drizzle.jpg
Country United States
State Washington
Region Snohomish County
Source Craig Lakes
 - elevation 3,888 ft (1,185 m) [1]
 - coordinates 48°11′14″N 121°41′53″W / 48.18722°N 121.69806°W / 48.18722; -121.69806 [2]
Mouth Stillaguamish River
 - elevation 325 ft (99 m) [1]
 - coordinates 48°16′55″N 121°47′15″W / 48.28194°N 121.78750°W / 48.28194; -121.78750Coordinates: 48°16′55″N 121°47′15″W / 48.28194°N 121.78750°W / 48.28194; -121.78750 [2]
Length 14 mi (23 km) [1]

The Boulder River is a river in the U.S. state of Washington.


The Boulder River originates in the Cascade Range. It flows northwest and then northeast through a portion of Boulder River Wilderness to join the Stillaguamish River. The Stillaguamish empties into Port Susan, part of Puget Sound. The river's source is the Craig Lakes, two remote lakes located high on the slopes of Three Fingers. After exiting the lakes the river plunges over Craig Lakes Falls as it descends into the Boulder River Wilderness.

The river flows northwest from there and just as it is turning northeast it tumbles over very bouldery Boulder Falls. The river also flows over one more waterfall, Half Mile Falls, before the river makes its final push toward its confluence with the North Fork Stillaguamish River.



  • Gerkman Creek
    • Ditney Creek

See also[edit]