The Comb is the range of steep hills along the Rethwellan-Valdemar border. The terrain is terrible for traveling in the best of times, and is frequently quite deadly in the winter. Travelers must bring all supplies with them.
"The hills themselves weren't all that high--but they were sheer rock faces for the most part, with little more than goat tracks leading through them, and not much in the way of vegetation, just occasional stands of wind-warped trees, a bit of scrub brush, rank grasses, and some moss and lichen..." (Oathbreakers)
From Oathbreakers, before Menmellith's independence in King Sendar's reign