Glacier National Park sits in northern Montana long the US/Canadian border. Across the border in Alberta is Waterton National Park, which is its sister park. Together they make up the Waterton/Glacier International Peace Park UNESCO World Heritage Site.
Glacier, as the name would suggest, best known for its glaciers, many of which are no longer visible in the summer months. It is also the home to Lake McDonald and the Lake McDonald lodge, one of the great lodges in the US National Park system.
One of the primary means of visiting the park is to drive the 50 mile Going-to-the-Sun Road which connects the eastern and western entrances of the park. While the views from the road are incredible, there were many stretches which didn’t allow you to pull over to take photos (especially when there is traffic in the park).
The closest airport to the park is Glacier Park International Airport near Kalispell, Montana near the western entrance to the park. As with most parks, it is probably best to visit as part of a longer road trip. Any trip to the park should include a visit to the adjacent Waterton National Park in Alberta as well.