The Marsh Ridge is a plateau in the north west corner of Forlorn Muskeg. You can access it by an explorable cave near the Waterfall or by using a rope (you have to deploy it first). On the Marsh Ridge there is a cave where food, a corpse, a bedroll and even a snare can be found. A rifle bullet can be found on him. You can also find a deer carcass, rabbits and birch saplings in the area. It is a nice spot but it is dangerous to stay for too long as there is not much food.