  We provide comprehensive calculations of total muon fluxes, energy and
angular spectra, and mean muon energies in deep underground laboratories -
under flat overburdens and mountains and underwater - using our latest
calculation code, MUTE v3. For precise modeling, we compiled rock densities and
chemical compositions for various underground labs, as well as topographic map
profiles of overburdens, and integrated them into our calculations. Our results
show excellent agreement with available data for most underground sites when
using the latest surface muon flux model, daemonflux. Moreover, since our
calculations do not rely on underground measurements of muons or other
secondaries, we can verify the consistency of measurements across different
detectors at different sites. MUTE is an open-source, publicly available
program, providing a solid framework for accurate muon flux predictions in
various underground environments, essential for applications in cosmic ray
physics and dark matter searches.
