Østre Bolæren is the easternmost of the three largest islands in the Bolærne archipelago, located in the outer Oslofjord, within Færder Municipality, Vestfold County, Norway. Covering approximately 0.59 square kilometers, the island's terrain is characterized by hilly landscapes and forested areas, with its highest point rising 35 meters above sea level.

Midtre Bolærne, also known as Mellom Bolæren, is the central island among the three largest in the Bolærne archipelago, located in the outer Oslofjord within Færder Municipality, Vestfold County, Norway. The island covers approximately 1.07 square kilometers and is part of the Færder National Park, established in 2013.

Vestre Bolærne is the westernmost of the three main islands in the Bolærne archipelago, situated within Færder Municipality in Vestfold County, Norway. The island encompasses an area of approximately 0.425 square kilometers, with its highest elevation reaching 50 meters above sea level.