What sort of world/setting is this – “real” (historical fiction, or natural… Tattooine, for example), dystopian (like Mad Max), otherworldly (like The Martian)?
Why might your character travel that stretch of terrain? How would they be traveling (by foot, motorcycle, pack animal, rover, etc)?
What else might be lurking along the sides, among the rocks, or higher up?
Are there things the character might discover, or that might find them?
Is this an environment that needs special equipment to survive – or at least during certain times of day?
Now go write…