Bokö Nature Reserve lies within the narrowest part of the Östergötland archipelago. In this island environment you can see both the lush greenery near the mainland and the smooth bare rocks towards the open sea.

Bokö Nature Reserve includes the islands Bokö, Brånnholmen, Långholmen, and about fifteen minor islands and skerries owned by the Swedish Environmental Protection Agency.

Once Bokö had the largest fishing community in this part of the Östergötland archipelago. Now there are just a few residents left and a resident farmer appointed by the Provincial Administrative Board manages the beautiful farmland. Two old farm animal breeds, Ringamåla cattle and Roslag sheep, are maintained on the pastures. The water meadows are managed by haymaking and they have a rich coastal flora that includes Strawberry Clover, Brookweed, Quaking Grass and Lesser Centaury.

West of the fishing village there is an oak pasture with traditional wooden fences and stone walls, stone mounds and pollarded lime and ash trees and it has a rich flora that includes the Elder-flowered Orchid, Greater Stitchwort and Crested Cow-wheat.

On Brånnholmen there are smooth rocks where there is an undisturbed forest that includes old pines and on the southeastern shore you can see the beautiful patterns of the eroded rocks.

The islands east of Bokö are forested with pine. The archipelago is rich in birds that include Velvet Scoter and numerous Eider. Some of the islands lie in bird protection zones and these have signs that give times of forbidden access.

The earth-filled cracks of the bare rocks and skerries that lie exposed out to sea are tinted with Yellow Stonecrop, Chives, Wild Pansy and Purple Loosestrife.