Wild Sky Wilderness Act of 2005

Wild Sky Wilderness Act of 2005 - Designates certain lands in the Skykomish River valley, Washington, as the Wild Sky Wilderness, to be managed by the Secretary of Agriculture.

Directs the Secretary to establish a trail plan. Authorizes the use of helicopter access to construct and maintain a joint Forest Service-Snohomish County telecommunications repeater site to provide improved communication for safety, health, and emergency purposes.

Allows the continued use of floatplanes on Lake Isabel in the Wild Sky Wilderness, subject to reasonable restrictions.

Authorizes the Secretary to acquire lands in the Wild Sky Wilderness by purchase, donation, or exchange, with priority to be given to specified Priority Acquisition Lands. Requires the boundaries of the Mt. Baker-Snoqualmie National Forest and the Wild Sky Wilderness to be adjusted to encompass any lands so acquired. Directs the Secretary to ensure adequate access to private in-holdings within the Wild Sky Wilderness. States that valuation of private lands shall be determined without reference to any restrictions on access or use which arise out of designation as a wilderness area.

Requires the Secretary to accept specified lands within the Snoqualmie National Forest, Washington, from the Chelan County Public Utility District if the District offers such lands to the Secretary (in title acceptable to the Secretary, and provided there is no hazardous material on the site) in exchange for a permanent easement, including helicopter access, to maintain an existing telemetry site to monitor snow pack on land within the Wenatchee National Forest, Washington.

Provides for extinguishment of the easement and reversion of all conveyed rights to the United States if the District no longer needs to maintain a telemetry site.