  Magnetic skyrmions are stable nanosized spin structures that can be displaced
at low electrical current densities. Because of these properties, they have
been proposed as building blocks of future electronic devices with
unprecedentedly high information density and low energy consumption. The
electrical detection of skyrmions via the Topological Hall Effect (THE), has so
far been demonstrated only at cryogenic temperatures. Here, we report the
observation of a skyrmion Topological Hall Effect near room temperature (276 K)
in a mesoscopic lamella of FeGe. This region unambiguously coincides with the
skyrmion lattice location revealed by neutron scattering. We provide clear
evidence of a reentrant helicoid magnetic phase adjacent to the skyrmion phase,
and discuss the large THE amplitude (5 n$\Omega$.cm) in view of the ordinary
Hall Effect.
