Context: The movie was filmed in and around the city of Las Vegas, New Mexico. Many of the buildings and structures which appeared in the film, including a historic Fred Harvey Company hotel adjacent to the train depot, the train yard, and a building near downtown, which was repainted with the name of "Calumet, Colorado", are still there today. An old Safeway grocery store was converted to a sound stage and used for several scenes in the movie.

Question: where was the original red dawn movie filmed?
Steam of consciousness below:
To answer the question, consider the following: The movie was filmed in and around the city of Las Vegas, New Mexico.
So, the answer is in and around the city of Las Vegas , New Mexico.