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Seventy-five miles northwest of Yellowstone Park, in the heart of Madison County, sits Ennis, Montana, a small community where history runs deeper than the nearby Madison River.  For many years, a simple grass runway and wind cone served as a landing strip for locals piloting small planes and for the occasional visiting barnstormer.

In the mid-1980’s, Madison County Commissioners envisioned developing a General Aviation Airport that would not only fulfill the community’s aviation needs but also stimulate the local economy, since Ennis was already a popular tourist destination.

The culmination of the commissioner’s 20-year effort was realized in 2008 when Big Sky Airport finished the reconstruction of its 4,700-foot runway and construction of a 1,900-foot runway extension.  Other project elements in 2008 included replacement/upgrade of runway lighting, pavement maintenance, and increased runway pavement strength.  The longer runway at Big Sky Airport better accommodates sophisticated jet aircraft, SEATs (single engine air tankers) used to help fight forest fires, and twin-engine fixed wing air ambulances for emergency medical transportation.


The 20-year journey for improved aviation services first began in 1985, when the Madison County Commissioners selected Robert Peccia and Associates (RPA) to assist with a controversial Master Plan / Site Selection Study and an Environmental Assessment (EA).  Not everyone in the community was in agreement about the proposed changes; however, progress continued after the studies concluded that the existing Big Sky Air Park was the best location to develop a full-blown General Aviation Airport to serve the Madison Valley.

A Master Plan / Site Selection Study was completed and following the Federal Aviation Administration’s (FAA) approval, an EA was undertaken resulting in the FAA issuing a Finding of No Significant Impact (FONSI) in 1988.   Madison County, with the FAA’s assistance, then acquired additional land to supplement some donated land for the initial airport development.  Original improvements saw the construction of a new asphalt runway, taxiway, and apron.  The project also included the installation of a new lighting system, beacon, lighted wind cone, and navigational aids to improve flight safety.  A few years later a parallel taxiway, additional apron space, and lighted taxiway guidance signs were added to the modern airport.

Since these earlier developments, Madison County Commissioners have worked diligently to maintain and improve their aviation facility.  Projects successfully completed since the first construction projects include:

  • Master Plan and EA Update;
  • Pavement maintenance;
  • Purchase of a truck with a quick hitch and a reversible snowplow along with a hydraulic sweeper for snow removal;
  • Automated weather reporting equipment installation;
  • Construction of a 30’ x 38’ steel-sided, heated building to serve as a snow removal equipment storage building; and
  • Land acquisition to facilitate the runway extension and protect approach areas.

With the completion of the 2008 projects, Madison County Commissioners and the FAA have invested over $4 million on ten airport improvement projects over 20 years!  

Long-term vision, combined with the commitment of the FAA and the Montana Aeronautics Division, not only provided an economic boost to the local economy but enhanced the safety of the airport, increased its ability to handle emergency services operations, and improved the quality of life for all its citizens.


The Big Sky (Ennis) Airport and Ennis are located adjacent to world famous blue ribbon fishery - the Madison River. The Madison valley is surrounded by the Beaverhead National Forest which abounds with all the big game species of Montana has to offer.

Big Sky Airport serves as a great base camp or jumping off point to visit Yellowstone National Park, our Nation's first National Park. Yellowstone features spectacular scenery, wildlife, water and thermal features.

We have a loaner car available on a first come first serve basis. The car needs to stay in the valley, just replenish the fuel you use.




Big Sky Airport - 2008

FAA Northwest Mountain Region Award

Commissioner Jim Hart and Airport Manager Don McCune traveled to Seattle to receive an award from the FAA. The Helena Airports District Office nominated Big Sky Airport and the Region awarded "Airport of the Year" to them for completion of the recent project and the Airport's historical efforts. To see the material submitted to the Region click Award Application.