  The MicroBooNE experiment is a liquid argon TPC experiment designed for
short-baseline neutrino physics, currently running at Fermilab. Due to its
location near the surface, cosmic muons can be a source of backgrounds to many
analyses and having a good understanding of the cosmic rays will be very
valuable for the experiment. These proceedings describe the physics motivation,
setup, and performance of a small external muon counter system, which will
provide improved calibration for the liquid argon TPC and better understanding
of the cosmogenic background.
