Oregon and California Land Grant Act of 2015

Oregon and California Land Grant Act of 2015 - Amends the O&C Lands Act of 1937 to establish uses and management requirements for the Oregon and California Railroad and Coos Bay Wagon Road grant land and other Oregon land administered by the Bureau of Land Management (BLM), the Forest Service, and the Army Corps of Engineers. Designates separate portions of the land for conservation and timber harvesting.

Specifies requirements for managing the land, including: prohibiting the harvesting of trees of a specified age in certain areas, stating that Oregon retains jurisdiction over fish and wildlife, restricting the use of pesticides, and authorizing treatment of hazardous fuels on adjacent private lands.

Directs the Department of the Interior to identify projects proposed under this Act, assess implementation, and complete other specified reports and analyses.

Establishes requirements for timber harvests on designated lands, including calculating projected harvests, restricting roads, harvesting timber to reduce the likelihood of wildfires, and prioritizing treatments near communities.

Designates lands for conservation purposes and establishes requirements for management, including restricting timber harvesting, motorized vehicles, and roads.

Sets forth procedures for administrative and judicial review of projects under this Act. Specifies a formula for sharing receipts generated on land between the U.S. Treasury, the BLM, and counties.

Transfers specified BLM-administered lands to be held in trust as reservations for the Confederated Tribes of Coos, Lower Umpqua, and Siuslaw Indians; and the Cow Creek Band of Umpqua Tribe of Indians.

Establishes and modifies specified wilderness areas and designations under the Wild and Scenic Rivers Act.