Strict reserves are the most tightly controlled protected areas, established to facilitate the protection and research of the Lithuanian landscapes that are of scientific, environmental or cultural value. All economic activity in strict reserves is forbidden. According to the characteristics of their establishment and organisation of activities, the strict reserves may be grouped as follows:
Within Lithuania, there are three state strict nature reserves (Čepkeliai, Kamanos and Viešvilė) and two state strict cultural reserves (Kernavė and Vilnius castles), 36 strict nature and 2 strict cultural reserves in Trakai Historical National Park, and one small strict reserve (Dubrava).