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Click for Google Map. Our GPS coordinates: 45deg 20' 29.50 N 111deg 42' 50.12 W. Ennis is located in southwestern Montana an hour from Bozeman to the northeast and Yellowstone National Park to the south. US Highway 287 runs through Ennis. To the north is I-90 (45 miles) and to the south is Yellowstone National Park (70 miles).
Ennis-Big Sky, MT (KEKS). About. In the heart of the worldâs best fly-fishing country and just a bit off the beaten path to Yellowstone National Park, theres no place better to visit than Ennis, Montana. Being the closest airport to the resorts at Big Sky, we are set up to take care of your needs year around.