The Apollo astronauts' footsteps can remain theoretically forever on the Moon as it has no atmosphere. Mars does have an atmosphere but a very thin one. Its pressure ranges from 72 Pa (0.0104 psi) on the top of Olympus Mons to 1240 Pa (0.18 psi) in the Hellas Basin. Since this is quite a difference, I'm curious on both scenarios: how long would astronauts' footprints remain on Mars in case astronauts land on Olympus Mons, and in case they land in the Hellas Basin? Due to the low atmospheric pressures, the winds on Mars aren't by far as strong as on Earth.