Wandering in the Valley
Scholars have said that whoever sees themselves wandering in a valley might be saying what they do not do, based on the Quranic verse about poets. As for a mountain in a dream, it symbolizes a cruel-hearted king or ruler, or a person of great stature, and may also signify a scholar or ascetic, high ranks, noble places, and good conveyances. It might also refer to goals and ambitions that can only be achieved through influence.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.