If you are looking for a little historical adventure, visit Earthquake Lake (commonly referred to as “Quake Lake”). On August 17, 1959 there was an earthquake at this location in Southern Montana killing 28 people. Known as the Hebgen Lake earthquake or the Yellowstone earthquake formed what is now Hebgen lake that is 190 feet deep and 6 miles long. The earthquake occurred on August 17th in the middle of the night in southwestern Montana. The earthquake was a 7.2 and caused a giant landslide that blocked the flow of the Madison River. This blockage formed what is now Hebgen Lake. There is a visitors center and some great little hikes along the lake.