Hamarøy is dominated by small fjords, pine, birch, and aspen woodland and forest, and coastal mountains. There are several nature reserves, such as Trollpollen nature reserve dominated by pine and birch located a few kilometers north of Innhavet, Lilandsvatnet wetland area, Steinslandsosen estuary, and Kvannskogen with old aspen trees with rich lichen flora. The mountain Hamarøyskaftet has long been regarded as nature's own phallic symbol .