PayScale's College Salary Report has salary data for alumni who earn Bachelor's degrees from colleges in Montana. Montana Tech and Montana State, arguably the best-known colleges, are both public.
The highest-earning alumni with a bachelor's degree often come from Montana Tech of The University of Montana. Graduate school doesn't seem to have a big effect on Montana college graduate earnings.
It should be no surprise that the best colleges in Montana, like Montana Tech, graduate a lot of engineers. If you're looking to go to college in Big Sky Country, and manage not to get lost inside Glacier National Park, there are plenty of prospects for eager graduates.