Kuskokwim Mountains

mountains, Alaska, United States

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June 30, 2026

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The Kuskokwim Mountains are a mountain range located in southwestern Alaska, United States. They are part of the central ranges of Alaska, which are generally lower than the ranges to the north and south. These mountains are drained by the Yukon and Kuskokwim river systems. The Kuskokwim Mountains are characterized by rolling ridges and numerous isolated, circular mountain groups. The bedrock consists of folded Paleozoic and Mesozoic sediments and volcanics, along with Cenozoic intrusions. While no glaciers are currently present, the nearby Ahklun Mountains show evidence of past glaciation. The Kuskokwim River, approximately 600 miles long, flows southwest from this region into Kuskokwim Bay.12

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Alaskan mountains
Physiography of the central ranges
…several smaller groups, notably the Kuskokwim Mountains. Those ranges are somewhat lower and more rolling than the eastern highlands, with ridges trending southwest-northeast. Numerous isolated, nearly circular groups of mountains rise above the ridges. The bedrock includes tightly folded Paleozoic and Mesozoic sediments and volcanics and Cenozoic (i.e., formed in…
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…several smaller groups, notably the Kuskokwim Mountains. Those ranges are somewhat lower and more rolling than the eastern highlands, with ridges trending southwest-northeast. Numerous isolated, nearly circular groups of mountains rise above the ridges. The bedrock includes tightly folded Paleozoic and Mesozoic sediments and volcanics and Cenozoic (i.e., formed in…
Read More