  Tidal radii of remote globular clusters (R_{GC}>= 35 kpc) are used to provide
constraints of the mass profile of the Milky Way galaxy that are independent of
kinematic data. The available data are consistent with the profile of an
isothermal sphere with circular velocity V_c = 220 +/- 40 km/s in the radial
range 35 kpc < R_{GC} < 100 kpc, in good agreement with all recent estimates.
The more robust constraint at large distances from the galactic center is
provided by NGC 2419, yelding an enclosed mass of ~ 1.3 (+2.9/-1.0) * 10**12
M_{sun} at R_{GC}= 90 kpc.
