  We construct a Galacto-Local Group rotation curve, combining the Galactic
rotation curve with a diagram, where galacto-centric radial velocities of outer
globular clusters and member galaxies of the Local Group are plotted against
their galacto-centric distances. The high-velocity ends of this pseudo rotation
curve within a radius R ~ 150 kpc are well traced by a rotation curve
calculated for the NFW (Navaro, Frenk, White) and Burkert dark halo models. The
NFW model indicates that the Galaxy's mass within 385 kpc, half distance to
M31, is ~ 4 x 10^{11}M_{sun}. High-velocity ends of the pseudo rotation curve
for the entire Local Group up to 1.5 Mpc indicate isothermal nature with a
terminal velocity of ~ 200 km/s. In order for the Local Group to be
gravitationally bound, an order of magnitude larger mass than those of the
Galaxy and M31 is required. This fact indicates that the Local Group contains
dark matter of mass ~ 5 x 10^{12}M_{sun} filling the space between the Galaxy
and M31. The mass density of the Galactic dark halo becomes equal to that of
the Local Group's dark matter at R ~ 100 kpc, beyond which the intracluster
dark matter dominates. If we define the Galaxy's radius at this distance, the
enclosed Galactic mass is ~ 3 x 10^{11}M_{sun}. We comment on the barionic
matter fraction of galaxies in the Local Group.
