Cub Driver wrote in message . ..
It's I-90 through Missoula to Helena I think, then I-15N, but that's
a nit.

Thanks for the nit!

What are the high altitudes on this route, and how narrow are the
passes? If I ever bring a Top Cub home, this will be my route.

IIRC the highest pass is less than 6k, and if you can fly at
8 or 9k you'll be above most of the terrain flanking the valleys
so it's comfy for a flatlander.

I'm not the right person to ask about "narrow" because, being a
flatlander, I think it's "narrow" any time I'm flying along
with terrain on either side *g*. People who do mountain flying
tell me there's plenty of room.

At the recent AYA convention there was a chap who had flown a
Tripacer all over South America, including through a 12,000 ft
pass in the Andes. Service ceiling on his plane was 10k, they
circled for an hour and a half in a thermal until they got
the altitude they needed. Amazing story, wish I'd gotten to
hear more of it.

Cheers,
Sydney