Olympus Mons is too large for HiRISE to capture in one image, but we can get very detailed closeups of parts of it. Here, we see a slope streak, possibly caused by a boulder rolling downhill and exposing the darker material.

ID: ESP_054599_2015
date: 20 March 2018
altitude: 277 km

https://uahirise.org/hipod/ESP_054599_2015
NASA/JPL-Caltech/UArizona
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