Tolt River

The Tolt River is located in the western foothills of the Cascade Mountains in north central King County in the U.S. state of Washington. The river begins at the confluence of the North Fork Tolt and South Fork Tolt rivers. It flows southwest joining the Snoqualmie River near Carnation, Washington. The Tolt River watershed is part of the larger Snohomish River and Puget Sound drainage basin.

Tolt River
Map of the Tolt River highlighted in the Snohomish River watershed
Location
Country	United States
State	Washington
County	King
Physical characteristics
Source	North Fork Tolt River
• coordinates	47°41′44″N 121°49′14″W[1]
Mouth	Snoqualmie River
• coordinates	47°38′24″N 121°55′25″W[1]
Discharge
• location	USGS gage 12148500, near Carnation, WA[2]
• average	572 cu ft/s (16.2 m3/s)[2]
• minimum	53 cu ft/s (1.5 m3/s)
• maximum	11,400 cu ft/s (320 m3/s)

The South Fork Tolt watershed provides ~30% of the drinking water for Seattle area residents.