Science Fiction. Yellowstone/ Continental Divide area has uplifted to over 100,000 feet in altitude. Truckers much traverse the uplift in space craft like trucks. Attacked by large crab like creatures. Read around 1980-1990.

[Frank]

Genre: science fiction
Plot details: story follows the Yellowstone / continental divide area has uplifted to over 100,000 feet in altitude. Truckers. Must traverse the uplift in space craft like trucks. The truckers have to fend off large crab like creatures that roam the high altitudes.
I read the story around 1980-1990

[Kris]

Frank, is this a novel for adults or teens?

Who does the main character work for?

I copied some details to the topic header. Feel free to edit it.

[Ayshe]

"Over flat mountain" from Bears Discover Fire and Other Stories? It was suggested here: https://www.goodreads.com/topic/show/...