Mirarce (meaning "wonderful winged messenger") is a genus of enantornithe bird from the Late Cretaceous of Utah.

The species name eatoni given in honor of Jeffrey Eaton in recognition of the decades of scientific work done on the Kaiparowits formation and the study of its fossil specimens.

The left ulna was preserved as a mineral cast of the internal cavity with several small fragments of fossilized bone surface.

[2] Mirarce fossils have been found in the Kaiparowits Formation of western North America, which dates to the late Campanian age of the Cretaceous.

At its large size, powerful talons and leg tendons, it would have been a raptorial predator akin to modern birds of prey.