A beautiful combination of the mountains and Big Sky of Montana!  This reservoir is quite large and even has a cool little island in the middle of it that you can cliff dive from when the waters are high enough!  There are boat docks, day-use areas, and campgrounds spread all around the reservoir.  The campground we featured in this review was an RV only site (because why would you tent camp there) that was right next to the Lewis & Clark Day-use area that has a giant canoe and flag pole.  It is an extended stay RV site with the option for paying for weeks if you plan on spending a good chunk of your summer here.  

Right along the road on the dam there is a sign showing you that you're halfway between the equator and the north pole!  Also nearby is the cute, cozy town of Dillon, where you can venture into the 1st Patagonia and Great Harvest stores in the world!  If you're here around Labor Day they also have a great rodeo and parade and the Patagonia Store has HUGE discounts!