Alpine Lake in the Bitterroot Mountains of Montana. This area is filled with hikes to mountain likes like Alpine. Be sure to include the Bitterroot Mountains in your Montana travel plans. You'll love the uncrowded hiking trails.
If there is to be had a better first breath of air to fill the lungs on a cool morning than one filled with sagebrush and served with a healthy side of adventure, I don't know what it is. I love Montana. I wanna go!