I haven’t ridden the bus here in Great Falls yet, but I plan to soon…just take a lazy Saturday, toss some change in my pocket, and ride the bus around town, trying all the routes. I like that it is called “Great Falls Transit” — it’s better than just “the bus.” 
Here’s the whole map of all the routes, and you can find times for each stop here. Standard fare is 75 cents, with discounts for students, seniors, and such.
I was a lucky guinea pig when the transit first came to town…I worked for my Aunt at the Down Town Business council NKA City Center Association & got to ride the buses dressed up as ET. Scared the hell out of one kid & then the bus got stuck in a snowdrift…screaming kid & all. Was great fun. Haven’t stepped on one since! LOL
You know, they should expand the hours…The bus comes right by my house, and I’d take it as transportation before enjoying a few cocktails downtown. May help curb drunk driving. Too bad the bus usually stops running long before I’m ready to go out.