What are the relative heights of mountain ranges in Middle Earth? And how would they compare to our modern world? I tend to imagine that after the First Age, the highest ranges were the White Mountains and Misty Mountains, comparable to the Rockies or Alps. I imagine that the Ephel Duath were smaller and not so wide because Frodo and Sam were able to get across relatively quickly, including time to battle Shelob, get capture and escape from Orcs, while in a weakened state. I imagine the Ephel Duath to be around the height of the White Mountains or Green Mountains of New England. Does Tolkien provide information about the height and breadth of his mountain ranges? Bonus points for the ranges of Beleriand!