  Let $X$ be a globally symmetric space of noncompact type, and
$\Gamma\subset\Isom(X)$ a Schottky group of axial isometries. Then
$M:=X/\Gamma$ is a locally symmetric Riemannian manifold of infinite volume.
The goal of this note is to give an asymptotic estimate for the number of
primitive closed geodesics in $M$ modulo free homotopy with period less than
$t$.
