The CDF muon detection system for Run 2 of the Fermilab Tevatron
is described.  Muon stubs are detected for |eta| < 1.5, and are matched to
tracks in the central drift chamber at trigger level 1 for |eta| < 1.25.
Detectors in the |eta| < 1 central region, built for previous runs, have
been enhanced to survive the higher rate environment and closer bunch
spacing (3.5 mu sec to 396 nsec) of Run 2.  Azimuthal gaps in the central
region have been filled in.  New detectors have been added to extend the
coverage from |eta| < 1.5, consisting of four layers of drift chambers
covered with matching scintillators for triggering.  The Level 1 Extremely
Fast Tracker supplies matching tracks with measured p(t) for the muon
trigger.  The system has been in operation for over 18 months.  Operating
experience and reconstructed data are presented.