We argue that extreme endurance sport can be valuable for some nonhuman animals. To make the case, we focus specifically on dogsled racing. We argue that, given certain views about the nature of self-affirmation, perceptual agency, and affordances, sled dogs are capable of realizing significant value through extreme endurance running. Because our focus is on the axiological question of the nature of the value of the sport for its participants, we do not claim that extreme dogsledding is ethical; indeed, we (...) acknowledge the morally objectionable aspects of the practice in its current form. Still, we offer our argument as a critical step in providing an adequate moral justification for a reformed model of dogsled racing. If it is permissible, that is likely because it offers some significant benefits to sled dogs. Given some assumptions about sled dogs’ capacity to be guided by both internal and external affordances, those benefits include self-affirmation. (shrink)