seattle：oplympic national park, mountain reiner
national park, north cascade national park, washington
state;
北线:
seattle--＞interstate90转94----＞chicago
waterton glacier national park, 在montana和canada边界，
theodore roosevelt national park,north dakota, 94号路
贯穿而过，
voyageurs national park, 在minnesota,canada 边界；
中线：
seattle--＞90---＞chicago
yellow stone NP 及稍南的Grand Teton NP, wyoming,
wind cave NP, Badland NP, south dakota,附近有Mt. Rushmore;
南线
seattle---＞90转84传80---＞chicago
rocky mountain NP, colorado,
除以上所提之国家公园外，沿途还有大量national forrest, national monument, national memorial, national wild life
refuge, national recreation area.
资料来源：
national geographic guide to the national parks of the
united states, 2001版