Tourism is of central importance to the Nepalese economy. Besides hydropower, it is regarded as having the greatest potential for income generation to support national as well as local development initiatives. Nepal has few development alternatives and so it is vital that tourism is not exploited to the extent that the industry’s potential is threatened. Research by the International Centre for Protected Landscapes (ICPL) at the University of Wales examines the changing nature of tourism in the Sagarmatha National Park and the wider Solu-Khumbu District. It evaluates the impact of ecotourism and recommends strategies to promote developmental sustainability.