Grimsdell Forest is a large forest near Castle Macindaw and the Araluen-Picta Border. It is home to Malcolm the healer and his outcasts. Will was told that he would "know it when he saw it" by a Macindaw guard, suggesting that it is recognizable as grim in appearance. At the end of The Siege of Macindaw, when offered a position at the castle, Malcolm chooses to stay in his clearing with his people. Malcolm uses various illusions to keep people away from his peaceful village, which has proved to be very effective.