On the first day of our trip we drive over Logan Pass, also known as the "Going to the Sun" road.  The pass goes over the Rocky Mountains and provides inspiring overlooks of the remaining glaciers as well as waterfalls and a lot of the wildlife which Glacier Park is know for.  If you go to Glacier, don't forget to bring binoculars or you will end up buying a pair.  They are a requirement as their is often wildlife that is too remote for cameras.