Mountains in dreams almost always represent a significant challenge or goal — and unlike stairs, which track incremental progress, a mountain reflects the overall scale of an ambition, viewed from a distance or up close.
Looking up at a mountain from the base
This version often appears at the very start of pursuing a significant goal, when the scale of what's ahead is starting to register — the dream reflects that moment of taking in the size of the challenge before beginning.
Climbing and struggling
Reflects the real, ongoing effort of pursuing a difficult goal — worth noting whether the struggle in the dream feels proportionate to how the challenge actually feels in waking life, or exaggerated by anxiety.
Reaching the summit
A strongly positive dream, often appearing close to — or slightly ahead of — an actual achievement or resolution, reflecting confidence that the effort will pay off.