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venus,
Sunday evening I took a long look at my Benchmark Montana atlas and learned something in the process. The route of the Burlington Northern (therefore Amtrak's route through Montana to Marias Pass) follows the Missouri River to a material extent, then jumps over a low elevation divide to the Marias River basin, of which Marias Pass is at the headwaters at the Continental divide. The elevations the rail line follows all the way across the state are as low or lower than along I-90, being in the 2,500-3,200' range. From Browning to Marias Pass is where the elevation picks up, but there are no other places of of high elevation, unlike I-90s 3 passes.
I've found it easy to find local elevations with google. Search "Browning, MT + elevation". Simply picking towns a railroad or highway passes through can give you an elementary topographic profile of a route.
Foy
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Wow thanks so much for the info, Foy. I've used google for towns or specific places, but was hoping to check out a route, like you did. It still sounds like the train is comfortable choice. Thanks for research suggestions. Hoping to head out in June!
