Grand Canyon Hydrogen-Powered Transportation Demonstration Act of 2005 - Directs the the Secretary of Energy and the Secretary of the Interior to implement jointly a research and development program, in partnership with the private sector, regarding hydrogen-based transportation technologies suitable for operations in sensitive resource areas such as national parks, including a demonstration of hydrogen-based public transportation technology at Grand Canyon National Park.
Authorizes the Secretary of Energy to extend existing Department of Energy hydrogen-related vehicle research and development programs in order to meet the objectives of research, development, and demonstration of a hydrogen-based alternative public transportation system suitable for shuttle and tour operations within Grand Canyon National Park.