  The available upward-going muon data from the Kamiokande, Baksan, MACRO, IMB,
and SuperKamiokande experiments are reviewed and combined. Bounds on the
neutrino mass and mixing parameters are derived for oscillations in two and
three flavors. These bounds are not in significant conflict with the
oscillation solution to the atmospheric neutrino flavor anomaly observed in the
sub-GeV and multi-GeV energy range. The combination of all the available
atmospheric data tends to favor the nu_mu <---> nu_e channel with respect to
the nu_mu <---> nu_tau channel, and to disfavor the threefold maximal mixing
scenario.
