Carrizo Plain National Conservation Area Act of 1998

Carrizo Plain National Conservation Area Act of 1998 - Designates the Carrizo Plain in California as the Carrizo Plain National Conservation Area.

Directs the Secretary of the Interior, acting through the Director of the Bureau of Land Management (BLM), to manage the public lands within the Area in accordance with applicable laws and a management plan devised by the BLM, the California Fish and Game Department, and the Nature Conservancy (plan). Directs the Secretary to review the plan and make necessary revisions to ensure its consistency with this Act and the conservation, management, and protection of the Area.

Establishes the Carrizo Plain National Conservation Area Management Fund for Area management expenses.

Authorizes the Secretary to acquire nongovernment, privately owned lands and interests within the Area by donation, exchange, or purchase, with owner consent.

Withdraws all Federal lands within the Area from all forms of entry, appropriation, or disposal under the public land laws and from location, entry, and patent under the Federal mining laws. Authorizes Area mineral development.

Directs the Secretary to ensure nonexclusive access to and use of Area public lands by Native Americans for traditional cultural and religious purposes.