To determine status and trend in the condition of selected natural resources in national park units in Alaska. There are four networks, each encompassing activities in a set of national parks, preserves and other park lands: • Arctic Network (ARCN): Gates of the Arctic, Noatak, Kobuk Valley, Cape Krusenstern, Bering Land Bridge. • Central Alaska Network (CAKN): Yukon-Charley Rivers, Denali, Wrangell-St. Elias. • Southwest Alaska Network (SWAN): Kenai Fjords, Lake Clark, Katmai, Alagnak Wild River, Aniakchak. • Southeast Alaska Network (SEAN): Glacier Bay, Klondike Gold Rush, Sitka. Main gaps: Not all data are currently available but we are working toward that goal. Funding limitations do not allow monitoring at detailed levels.