It's a good-sized map, around half as big as Frostgorge Sound, which lies immediately to the south.
Where Frostgorge is particularly bleak and barren, all icefields and glaring white. Bitterfrost, despite being further north and even colder, enjoys a much more varied environment.
Hot springs encourage bursts of green among the blue-white snow and dark pines. Rivers flow freely. This attracts quaggans but I guess you can't have everything.