Far Harad was large enough to have presumably several different regions and climates, although much of it was covered in jungle. Several large rivers flowed through the continent. Much of the continent's western edge was bordered by a mountain range called the Grey Mountains, not to be confused with the Ered Mithrin. During the First Age, the flat plains west of the Grey Mountains sunk under the water, possibly during the War of Wrath when most of Beleriand was also sunken.
At least some men of Far Harad were allied with Sauron in the War of the Ring, and some of them fought in the Battle of the Pelennor Fields. The men of Far Harad were described in The Return of the King as "black men like half-trolls with white eyes and red tongues", as well as being called Troll-men. Nothing is known of the culture or language of these men, or even in which part of Far Harad they lived.