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The park rises upward from the massive Cascade ranges seen northeast of Seattle, widening in a swath of snow-covered peaks all the way to the Canadian border. The broad Skagit River and many large creeks cut through the valleys; most end in the long arm of Lake Chelan in the south or in the snakelike expanse of Ross Lake at the park's northern edge. Even in summer, valleys can start the day shrouded in fog; it's best to drive the highway west to east in afternoon. A morning start is a good choice coming the other way. The most sensational scenery, however, is reached by hiking to one of the high park passes or mountain lookouts.