Alternative tourism, particularly backpacker and volunteer tourism, has developed significantly in recent times. This rapid development has contributed to criticism of potential negative effects, notably of the environmental, cultural, economic and social impacts associated with backpacker tourism. Volunteer tourism, by contrast, has been seen in positive terms as more sustainable, combining altruistic motivations with the travel concept. This paper explores backpacker interest in volunteer tourism and identifies overlaps in motivations between the two forms of tourism; 249 self-administered questionnaires were collected from backpackers within backpacker hostels in central Melbourne, Australia. The findings of this study suggest that a motivational overlap exists between backpacker and volunteer tourists, indicating potential for the creation of volunteer tourism products catering specifically for the backpacker market. This may encourage more sustainable tourism experiences within the burgeoning backpacker market, thus addressing some of the negative criticism of the latter. This paper also discusses the implications of these findings for the marketing and development of volunteer tourism products for both the backpacker and volunteer tourism markets.