This thesis is an exploration of a selection of the writings of Robert 'Bob' Marshall. Looking at Marshall's writing through the lens of ecocriticism, this thesis look at first how Marshall documented his own experience in the American wilderness, paying attention to how it formed a complex conception of wilderness. Marshall, also argued directly for the preservation of wilderness, and worked actively for it. In wilderness Marshall, both found great personal happiness and a deep enjoyment through intimate contact with nature. To Marshall, wilderness could also inform a more, and thus better, egalitarian political organization, as well as deeper and more fulfilling social happiness. His work for preservation is also interesting, as he often uses the discourse of conservation, to argue for the preservation of wilderness.