  Magnetic skyrmions are topologically non-trivial nanoscale objects. Their
topology, which originates in their chiral domain wall winding, governs their
unique response to a motion-inducing force. When subjected to an electrical
current, the chiral winding of the spin texture leads to a deflection of the
skyrmion trajectory, characterized by an angle with respect to the applied
force direction. This skyrmion Hall angle was believed to be skyrmion
diameter-dependent. In contrast, our experimental study finds that within the
plastic flow regime the skyrmion Hall angle is diameter-independent. At an
average velocity of 6 $\pm$ 1 m/s the average skyrmion Hall angle was measured
to be 9{\deg} $\pm$ 2{\deg}. In fact, in the plastic flow regime, the skyrmion
dynamics is dominated by the local energy landscape such as materials defects
and the local magnetic configuration.
