  Analytical calculations and recent numerical experiments have shown that a
sizable of the mass in our Galaxy is in a form of clumpy, virialized
substructures that, according to \cite{dms:05}, can be as light as $10^{-6}
\msun$. In this work we estimate the gamma-rays flux expected from dark matter
annihilation occurring within these minihalos, under the hypothesis that the
bulk of dark matter is composed by neutralinos. We generate mock sky maps
showing the angular distribution of the expected gamma-ray signal. We compare
them with the sensitivities of satellite-borne experiments such as GLAST and
find that a possible detection of minihalos is indeed very challenging.
