The Magdalena Ridge Observatory Interferometer will be an optical array composed of ten telescopes, each approximately 1.4 meters in diameter. The telescopes making up the interferometer will be spaced by distances of up to 400 meters and will be optically linked in order to make images of astronomical objects with unprecedented detail. This setup will simulate the resolving power of a single telescope up to 400 meters in diameter. As a result of the large number of telescopes in the array, the interferometer will be able to make accurate images of complex astronomical objects many times faster than other existing and planned arrays.

It will be located in the Magdalena Mountains of central New Mexico.