  We present measurements of the W boson mass at the Tevatron based on $W \to
\mu \nu$ events collected by CDF and $W \to e \nu$ events observed by D0 in Run
Ib (1994--95). The W boson mass measured in the preliminary CDF analysis is
80.43 \pm 0.10 (stat) \pm 0.12 (syst) GeV/c^2. The D0 measured value is 80.44
\pm 0.10 (stat) \pm 0.07 (syst) GeV/c^2. We also describe measurements of the
trilinear gauge boson couplings. The limits obtained on the WW\gamma and WWZ
anomalous couplings from a combined D0 analysis using $W\gamma$, $WW \to \ell
\nu \ell^\prime \nu^\prime$, and $WW/WZ \to e \nu jj$ production are: -0.30 <
\Delta\kappa < 0.43, -0.20 < \lambda < 0.20, and -0.52 < \Delta g^Z_1 < 0.78,
for a dipole form factor scale of 2 TeV. Improved limits have been obtained by
combining these results with the limits derived from the LEP experiments.
