Øvre Anar River National Park, national park in the southeastern Finnmark Plateau region, northern Norway, bordering the Lemmen River National Park of Finland. One of the largest of Norway’s national parks, it covers an area of 537 square miles (1,390 square km). Low hills covered by birch and pine forest and dotted by bogs and lakes are characteristic of the area, in which large numbers of domesticated reindeer graze during the winter.