To designate as wilderness certain lands within the Rocky Mountain National Park and to adjust the boundaries of the Indian Peaks Wilderness and the Arapaho National Recreation Area on the Arapaho National Forest in the State of Colorado.

SECTION 1. SHORT TITLE AND PURPOSE.

    (a) Short Title.--This Act may be cited as the ``Rocky Mountain 
National Park Wilderness and Indian Peaks Wilderness Expansion Act''.
    (b) Purpose.--The purpose of this Act is to include in the National 
Wilderness Preservation System certain lands within the Rocky Mountain 
National Park, Colorado, in order to protect the enduring scenic and 
historic wilderness character and unique wildlife values of the lands 
as well as the scientific, educational, inspirational, and recreational 
resources, values, and opportunities of the lands; and to adjust the 
boundaries of the Indian Peaks Wilderness and the Arapaho National 
Recreation Area on the Arapaho National Forest in Colorado.

SEC. 2. DESIGNATION OF ROCKY MOUNTAIN NATIONAL PARK WILDERNESS.

    (a) Designation.--In furtherance of the purposes of the Wilderness 
Act (16 U.S.C. 1131 et seq.), certain lands within the Rocky Mountain 
National Park, Colorado, which comprise approximately 249,339 acres, as 
generally depicted on the map titled ``Rocky Mountain National Park, 
Colorado Wilderness Boundaries'' and dated February 2006, are hereby 
designated as wilderness and, therefore, as a component of the National 
Wilderness Preservation System. The designated lands shall be known as 
the Rocky Mountain National Park Wilderness.
    (b) Map and Description.--
            (1) Preparation and submission.--As soon as practicable 
        after the date of the enactment of this Act, the Secretary of 
        the Interior shall prepare a map and a boundary description of 
        the Rocky Mountain National Park Wilderness designated by 
        subsection (a) and file the map and boundary description with 
        the Committee on Resources of the House of Representatives and 
        the Committee on Energy and Natural Resources of the Senate. 
        The map and boundary description shall be on file and available 
        for public inspection in the office of the Director of the 
        National Park Service, Department of the Interior.
            (2) Treatment.--The map and boundary description prepared 
        under paragraph (1) shall have the same force and effect as if 
        included in this Act. The Secretary of the Interior may correct 
        clerical and typographical errors in the map and description.
    (c) Potential Wilderness Lands.--
            (1) Definition.--In this section, the term ``potential 
        wilderness lands'' means--
                    (A) lands identified as potential wilderness on the 
                map referred to in subsection (a); and
                    (B) lands and interests therein acquired by the 
                United States on or after the date of the enactment of 
                this Act that are located within the boundaries of the 
                Rocky Mountain National Park and are contiguous with 
                lands designated as wilderness by this Act.
            (2) Inclusion in wilderness.--Upon publication in the 
        Federal Register of a notice by the Secretary of the Interior 
        that all uses of a parcel of potential wilderness lands 
        inconsistent with the Wilderness Act have ceased, the parcel 
        shall be included in the Rocky Mountain National Park 
        Wilderness designated by subsection (a) and managed as provided 
        in section 3. The Secretary of the Interior shall modify the 
        map and boundary description prepared under subsection (b) to 
        reflect the inclusion of the parcel in the Rocky Mountain 
        National Park Wilderness.
    (d) Exclusion of Certain Lands.--The boundaries of the Rocky 
Mountain National Park Wilderness and the potential wilderness lands 
specifically exclude the following:
            (1) The Grand Ditch (including both the main canal of the 
        Grand Ditch and a branch thereof known as the specimen Ditch) 
        and its right-of-way as well as associated appurtenances, 
        structures, buildings, camps, and worksites in existence as of 
        June 1, 1998.
            (2) Lands owned by the St. Vrain & Left Hand Water 
        Conservancy District, including Copeland Reservoir and the 
        Inlet Ditch to such reservoir from the North St. Vrain Creek, 
        amounting to approximately 35.38 acres.
            (3) Lands owned by the Wincentsen-Harms Trust, amounting to 
        approximately 2.75 acres.
            (4) Lands within the area depicted as ``East Shore Trail 
        Area'' on the map described in subsection (b).
    (e) East Shore Trail Area.--
            (1) Alignment line and trail.--
                    (A) Not later than one year after the date of the 
                enactment of this Act, the Secretary shall establish an 
                alignment line for a trail, to be known as the East 
                Shore Trail, located within the East Shore Trail Area, 
                to maximize the opportunity for sustained use of the 
                trail without harm to affected resources or conflicts 
                among users. After establishing the alignment line, the 
                Secretary shall identify the boundaries of the trail, 
                but the trail shall not extend more than 25 feet east 
                of the alignment line or be located within the Rocky 
                Mountain National Park Wilderness.
                    (B) Nothing in this Act shall be construed to 
                require the construction of a trail along the alignment 
                line established pursuant to this paragraph or to limit 
                the extent to which any otherwise applicable laws or 
                policies shall apply with respect to any decision 
                regarding construction of such a trail.
            (2) Map adjustment.--After establishing the alignment line 
        of the East Shore Trail, the Secretary shall adjust the map of 
        the wilderness area designated by subsection (a) so that the 
        western boundary of the wilderness is 50 feet east of the 
        alignment line.
            (3) Other adjustments.--To the extent necessary to protect 
        National Park resources, the Secretary from time to time may 
        adjust the boundaries of the East Shore Trail, but no 
        adjustment shall have the effect of placing any portion of such 
        trail within the boundary of the wilderness area.
            (4) Time limitation for authorization of use by 
        nonmotorized bicycles.--If the East Shore Trail has not been 
        constructed and authorized for use by nonmotorized bicycles on 
        or before the date that is 25 years after the date of the 
        enactment of this Act, the East Shore Trail Area shall be 
        included in the Rocky Mountain National Park Wilderness 
        designated by subsection (a) and managed as provided in section 
        3, and the Secretary shall modify the map and boundary 
        description of such wilderness area to reflect the inclusion of 
        such lands in wilderness.
    (f) Relation to Lands Outside Wilderness.--
            (1) Use of lands.--Except as provided in this subsection, 
        nothing in this Act shall affect the management or use of any 
        lands not included within the boundaries of the Rocky Mountain 
        National Park Wilderness or the potential wilderness lands.
            (2) Use of motorized vehicles.--Until the date that is 25 
        years after the date of the enactment of this Act, no use of 
        motorized vehicles or other motorized machinery not permitted 
        on March 1, 2006, shall be allowed in the East Shore Trail 
        Area, except as may be necessary for constructing or 
        maintaining the East Shore Trail, if such construction is 
        authorized by the Secretary.
            (3) Management of pending wilderness.--Pending their 
        inclusion in wilderness pursuant to subsection (c)(2), the 
        potential wilderness lands shall be managed to protect any 
        wilderness characteristics and to maintain their suitability 
        for inclusion in wilderness.

SEC. 3. MANAGEMENT OF ROCKY MOUNTAIN NATIONAL PARK WILDERNESS.

    (a) Management Generally.--Subject to valid existing rights, lands 
designated as wilderness by section 2(a) or subsequently included in 
the Rocky Mountain National Park Wilderness by section 2(c) shall be 
managed by the Secretary of the Interior in accordance with the 
Wilderness Act (16 U.S.C. 1131 et seq.) and this Act. With respect to 
the lands designated as wilderness by section 2(a), any reference in 
the Wilderness Act to the effective date of the Wilderness Act shall be 
deemed to be a reference to the date of the enactment of this Act. With 
respect to the lands subsequently included in the Rocky Mountain 
National Park Wilderness by section 2(c), any reference in the 
Wilderness Act to the effective date of the Wilderness Act shall be 
deemed to be a reference to the date on which the lands were included 
in the wilderness area.
    (b) Water Rights.--
            (1) Findings.--Congress finds the following:
                    (A) According to decisions of the courts of the 
                State of Colorado, the United States has existing 
                rights to water within the Rocky Mountain National 
                Park.
                    (B) Those rights are sufficient for the purposes of 
                the Rocky Mountain National Park Wilderness as 
                designated by section 2.
                    (C) In light of the findings in subparagraphs (A) 
                and (B), there is no need for this Act to effect a 
                reservation by the United States of any additional 
                water rights to fulfill the purposes for which the 
                Rocky Mountain National Park Wilderness is designated.
            (2) No reservation.--Nothing in this Act or any action 
        taken pursuant to this Act shall constitute either an express 
        or implied reservation of water or water rights for any 
        purpose.
    (c) Colorado-Big Thompson Project.--
            (1) Current activities.--Activities on, under, or affecting 
        the lands designated as wilderness by section 2 relating to the 
        monitoring, operation, maintenance, repair, replacement, and 
        use of the Colorado-Big Thompson Project and its facilities 
        which were allowed as of June 1, 1998, shall be allowed to 
        continue and shall not be affected by the designation of the 
        lands as wilderness.
            (2) New activities.--In addition to the activities 
        described in paragraph (1), any other activities on, under, or 
        affecting the lands designated as wilderness by section 2 that 
        because of emergencies or catastrophic events become necessary 
        for the operation, maintenance, repair, replacement, and 
        continued use of the Colorado-Big Thompson Project and its 
        facilities shall be allowed, subject only to reasonable 
        restrictions which are established by the Secretary of the 
        Interior to protect the wilderness values of the lands. In 
        implementing this paragraph, the Secretary shall not establish 
        any restrictions on the activities that would prevent the 
        occurrence of such necessary activities or that would reduce 
        the water supply provided by the Colorado-Big Thompson Project 
        or the Windy Gap Project.
            (3) Relation to authority in act establishing park.--
        Nothing in the first section of the Act of January 26, 1915 (16 
        U.S.C. 191), shall be construed to allow development within the 
        lands designated as wilderness by section 2 of any reclamation 
        project not in existence as of the date of the enactment of 
        this Act.
    (d) No Buffer Zones.--Congress does not intend that the designation 
by this Act of the Rocky Mountain National Park Wilderness creates or 
implies the creation of protective perimeters or buffer zones around 
the wilderness area. The fact that nonwilderness activities or uses can 
be seen or heard from within the wilderness area shall not, of itself, 
preclude such activities or uses up to the boundary of the wilderness 
area.

SEC. 4. BOUNDARY ADJUSTMENT OF INDIAN PEAKS WILDERNESS AND ARAPAHO 
              NATIONAL RECREATION AREA.

    (a) Indian Peaks Wilderness.--Section 3(a) of Public Law 95-450 is 
amended--
            (1) by striking ``seventy thousand acres'' and inserting 
        ``74,195 acres'' ; and
            (2) by striking ``dated July 1978'' and inserting ``dated 
        February 2006''.
    (b) Arapaho National Recreation Area.--Section 4(a) of Public Law 
95-450 is amended--
            (1) by striking ``thirty-six thousand two hundred thirty-
        five acres'' and inserting ``35,235 acres''; and
            (2) by striking ``dated July 1978'' and inserting ``dated 
        February 2006''.

SEC. 5. AUTHORITY TO LEASE LEIFFER PROPERTY.

    (a) Authorization.--The provisions of section 802(a) of Public Law 
105-391 (16 U.S.C. 1a-2k) shall apply to the tract of land described in 
subsection (b) to the same extent as if such property was part of the 
National Park System.
    (b) Land Described.--Subsection (a) applies to the tract of land 
near the eastern boundary of Rocky Mountain National Park in Larimer 
County, Colorado, administered by the National Park Service and known 
as the Leiffer tract.

Summary: Rocky Mountain National Park Wilderness and Indian Peaks Wilderness Expansion Act- Designates certain lands in Rocky Mountain National Park, Colorado, as wilderness and components of the National Wilderness Preservation System, which shall be known as the Rocky Mountain National Park Wilderness.

Directs the Secretary of the Interior to establish an alignment line for a trail, which shall be known as the East Shore Trail, located within the East Shore Trail Area and, after establishing the alignment line, to identify the boundaries of such Trail. Provides for the inclusion of the East Shore Trail in the Rocky Mountain National Park Wilderness if such Trail has not been constructed and authorized for use by motorized bicycles 25 years after enactment of this Act.

Bars, until 25 years after this Act's enactment, the use of motorized vehicles or other motorized machinery not permitted on March 1, 2006, from being allowed in the East Shore Trail Area, except for constructing or maintaining the East Shore Trail, if such construction is authorized by the Secretary.

Amends the Indian Peaks Wilderness Area, Arapaho National Recreation Area and the Oregon Islands Wilderness Area Act to provide for a boundary adjustment of the Indian Peaks Wilderness Area and the Arapaho National Recreation Area by: (1) increasing the acreage of the Indian Peaks Wilderness Area; and (2) decreasing the acreage of the Arapaho National Recreation Area.