Alsek River

Science Center Objects

The Alsek River is the furthest north watershed in the transboundary study of Southeast Alaska, reaching 300 miles north of Haines Junction, Yukon Territory.

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Real-time Streamflow of the Alsek River Graph

Real-time Streamflow of the Alsek River | Historical Water Quality DataSummary of all Available Data at Current Location | Summary of all Available Data from Upstream Location

View of Alsek River, updated daily

The Alsek River is the furthest north watershed in this study, reaching 300 miles north of Haines Junction, Yukon Territory.  Most of the land in the Alsek watershed is within protected wilderness areas or national parks. With the exception of historic mining and small placer mines in the upper watershed, the Alsek River is considered pristine with no planned large scale mining. Yakutat residents occasionally access Dry Bay for traditional and customary fishing of sockeye salmon, a fishery which was more important before sharp declines in the 1980s and 1990s. The USGS is studying the Alsek to document the natural conditions in this watershed for comparison with the other four rivers and to collect baseline data in the event that significant mining does occur in this watershed in the future. CCTHITA began sampling the Alsek in June 2018 and Yakutat Tlingit Tribe (YTT) started sampling in September 2018. Both CCTHITA and YTT sample monthly during ice-free periods. More information about these studies is available in the Links tab. The USGS began sampling the Alsek in May 2020.

Alsek River Layout

Illustration detailing the Alsek River layout.  (Public domain.)