To dream of mountains means that there are pressing issues and urgent matters to resolve. If you are on top of the mountain, this signifies that you have accomplished your goals. On one hand, mountains denote a higher level of understanding, awareness, and wisdom.
To dream that you are climbing a mountain is symbolic of your focus and persistence for personal goals and objectives.
To dream that you fell off a mountain suggests that you want instant success and gratification. You believe the ends will justify the means. This dream also tells of your tendency to succumb to pressures in your environment.