We report a measurement of the W boson mass based on an integrated luminosi
ty of 82 pb(-1) from <p(p)over bar> collisions at root s = 1.8 TeV recorded
in 1994-1995 by the D0 detector at the Fermilab Tevatron. We identify W bo
sons by their decays to ev, where the electron is detected in the forward c
alorimeters. We extract the mass by fitting the transverse mass and the ele
ctron and neutrino transverse momentum spectra of 11 089 W boson candidates
. We measure M-w = 80.691 +/- 0.227 GeV. By combining this measurement with
our previously published central calorimeter results from data taken in 19
92-1993 and 1994-1995, we obtain M-w = 80.482 +/- 0.091 GeV.