This paper examines host and backpacker perceptions of the environmental impacts of backpacker tourism on local communities in less-developed countries. The discussion is based on data collected in 2011 via surveys and interviews with host and backpacker populations in the Yasawa Islands of Fiji. The results suggest that there is a significant difference between the perceptions of hosts and their guests towards the environmental impacts of backpacker tourism. Backpackers believe that they generate a higher extent of negative environmental impacts on the destination than those perceived by their hosts. This study broadens the understanding of the impacts of backpacker tourism from dual perspectives – both the hosts and guests.