We present some of the results of our tracking investigations using PATRIS. Both short‐term and long‐term tracking, using large numbers of particles, were performed and analyzed. When switching from short‐term (1000 turns) to long‐term (the maximum achieved was 10 million turns) tracking mode, we observed a small (about 14%) reduction of the dynamic aperture. We also empirically confirmed that the distinction between short‐term and long‐term tracking becomes meaningful for a number of turns of the order of 100,000 rather than 10,000, i.e. that 105is the threshold which must be crossed to get any appreciable difference between a 1000‐turn run and a longer one. We have also found that a high density of initial conditions employed in tracking is somewhat more important for accurate determination of the dynamic aperture than a large number of turns.