A simulation package for the transport of high-energy muons has been develo
ped. It has been conceived to replace the muon propagation software modules
implemented in the detector simulation program GEANT3. Here we discuss the
results achieved with our package and we check the agreement with numerica
l calculations up to 10(8) GeV. (C) 2001 Elsevier Science B.V. All rights r
eserved.