Draw a horizon line
Sketch the main mountain shapes with simple triangles or peaks
Add smaller peaks beside and behind the main ones
Refine the outlines to make them look more natural and uneven
Draw the mountain ridges and slopes
Add snow caps or rocky tops if desired
Shade one side of each mountain to show light and shadow
Add texture with short lines and jagged marks
Draw trees, rocks, or clouds for scale and detail
Darken the final lines and erase extra sketch marks