Ice Age Floods National Geologic Trail Designation Act

(This measure has not been amended since it was reported to the Senate on October 19, 2005. The summary of that version is repeated here.)

Ice Age Floods National Geologic Trail Designation Act - Designates the Ice Age Floods National Geologic Trail, a trail from Missoula, Montana to the Pacific Ocean, to provide for the public appreciation, understanding, and enjoyment of the nationally significant natural and cultural features of the Ice Age Floods and to promote efforts to interpret and educate along the pathways of the floods.

Requires the Secretary of the Interior, acting through the Director of the National Park Service, to administer the Trail in accordance with this Act. Prohibits the Trail, except as provided in this Act, from being considered a unit of the National Park System (NPS). Allows the Secretary, in order to improve management of the Trail and coordinate Trail activities with other public agencies and private entities, to establish and operate a Trail management office at a central location within the vicinity of the Trail.

Requires the Secretary to prepare a cooperative management and interpretation plan for the Trail.

Authorizes the Secretary to plan, design, and construct interpretive facilities for sites associated with the Trail if the facilities are constructed in partnership with state, local, tribal, or nonprofit entities and are consistent with the cooperative management and interpretation plan.

Allows the Secretary, in order to facilitate the development of coordinated interpretation, education, resource stewardship, visitor facility development and operation, and scientific research associated with the Trail and to promote more efficient administration of the sites associated with the Trail, to enter into cooperative management agreements with appropriate officials in the states of Montana, Idaho, Washington, and Oregon in accordance with the authority provided for units of the NPS. States that, for purposes of such authority only, the Trail be considered an NPS unit.

Permits the Secretary to enter into cooperative agreements with public or private entities to carry out this Act.

Specifies the effect of this Act on private property rights.

Declares that designation of the Trail does not create any liability for, or affect any liability under any law of, any private property owner with respect to any person injured on the private property.

Authorizes appropriations.