Lake Chelan was carved by two competing glaciers -- the Chelan glacier and the continental ice sheet. Their back-and-forth movement created the broad lower lake and narrow upper lake. The park is set in rocky terrain, with forested areas along Twenty-five Mile Creek. The region receives an average annual rainfall of 11 inches, with 39 inches of average annual snowfall.
| | • Douglas Fir
• Ponderosa Pine
• Birch
• Poplar
• Rose
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