Hazards
Volcanoes near the Yukon River, such as Volcano Mountain in the Fort Selkirk Volcanic Field, may have once partly blocked or at least altered the Yukon River by lava flows. Any future activity in this area could disrupt the course of the river and could have serious impacts on people living or working downstream.
Navigational obstacles on the Yukon River are the Five Finger Rapids and Rink Rapids downstream from Carmacks.
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