Highlights: Beautiful views along I-90, Butte downtown Lowlights: Severe storms On day 3 (Thursday), we drove from Missoula to Billings, Montana. As predicted in our second blog post, we broke in the travel potty with “the inevitable emergency side-of-the-interstate-in-Montana pit stop” somewhere between Missoula and Butte. I-90 through Montana gets pretty sparse after Missoula so …