The National Park Service (NPS) annually receives hundreds of millions of dollars in donated funds, goods, and services to support its 391 parks and other sites. But concerns have been raised about potential risks, such as undue donor influence, new long-term maintenance costs, or commercialization of parks. To address these concerns, the NPS has developed policies for managing donations, but questions remain about the agency's ability to do so effectively. This report examines: (1) how donations and related partnerships have supported the NPS; (2) the policies and processes the agency uses to manage donations and how well they are working; and (3) what the agency could do to enhance its mgmt. of donations and related partnerships. Illus.