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We show that high concentration of skyrmions can be achieved in magneticfilms with quenched disorder. A 2D system of Heisenberg spins with feromagneticexchange, $J$, and random magnetic anisotropy of strength $D_R \ll J$ has beenstudied. Analytical theory for the dependence of the average skyrmion size onthe magnetic field $H$, and for the stability of pinned skyrmions, iscomplemented by numerical studies of 2D lattices containing up to 40 millionspins. At low fields the average size of the skyrmion, $\lambda$, is determinedby the average size of Imry-Ma domains. On increasing the field the skyrmionsfirst shrink, with $\lambda \propto D_R/H$, and then collapse at fieldsdistributed around $H_c \propto D_R^{4/3}$. Concentration of the skyrmions goesdown with the field as $\exp[-(H/H_c)^{3/2}]$.

Skyrmion Glass in a Disordered Magnetic Film