Location
The area Dolina Pilicy (30833 ha) covers the 80 km tract of the Pilica River valley, 1-5 km wide, between Inowlodz and Ostrowek-Mniszew (at the mouth to the Vistula River). The northern part of the valley is boarded with a steep escarpment up to 20 m high, and the southern part is flat.

Landscape
The river bed is 150 m wide and full of numerous islands and sandbars. Strongly meandering river makes lots of watercourses. The majority of the valley is covered by meadows and pastures. After the construction of Sulejowski water reservoir in 1973, the water flow in the river decreased by 25%. Natural floods of the valley are extremely rare, which leads to the poorer watering of the valley. There is a large (several hundred hectares) mire in the south-western part of the area, called Blota Brudzewskie.

Flora
The flood terrace is partly drained, dominated in 1/3 by meadows and pastures with different humidity, as well as sedge and reed beds. Humid depressions are overgrown with willow and alders. As the result of the cessation of their use, part of the meadows and pastures, including drained ones, are in the course of overgrowing with shrubs and trees or swamping.

There is a complex of peat-pits and forests covering the area in the south. At the edge of the site, on the southern bank of the river between Gapin and Grzmiaca, spreads the biggest and the most valuable forest complex consisting different forest habitat types including fresh coniferous forest, ash-alder alluvial forests and mixed riparian woods. The area is mainly used as agricultural land and forests cover only about 20%.

The most interesting exponents of the flora are: Fringed Pink, Globe Flower, Floating Watermoss, European Dwarf Cherry and Labrador Tea.

Fauna
The area is otters' and beavers' habitat, two endangered species under special protection. Among birds there are also over one hundred singing mails of Common Rosefinches which are often accompanied by Bluethroats and River Warblers.

On sandbanks you can find nesting species like: Little Plovers and Ringed Plovers and Little Terns. The steep banks of the river are optimal place to dig nesting holes for about 1500 pairs of Bank Swallows and 20 pairs of Common Kingfisher.

Meadows and pastures are also a habitat for one hundred pairs of Black Tailed Godwit and half a size of Redshank's population. You can also meet the unique bird Green Sandpiper which takes the nests of the Thrushes and nests his eggs on trees. You can also spot Common Sandpiper which has its habitat near the riverbanks.

During spring and autumn migration flocks of wild ducks and geese stay in the Pilica Valley to rest and to feed themselves.

Among mammals mentioned in European Directives you can meet: beavers and otters in this area. Among birds it is worth to mention about: Ortolan Bunting, Red Bucked Shrike, Tawny Pipit, Red Breasted flycatcher, Barred Warbler, Bluethroat, Woodlark, Middle Spotted Woodpecker, Grey-headed Woodpecker, Black Woodpecker, Common Kingfisher, European Nightjar, Eagle-owl, Little tern, Common tern, Whiskered tern, Black Tern, Ruff, Corn Crake, Little Crake, Spotted Crake, Common Crane, Black Grouse, Montagu's Harrier, Marsh Harrier, European Honey Buzzard, White-tailed Eagle, Lesser Spotted Eagle, Black Stork, White Stork, Great Bittern, Little Bittern. Also different kinds of fishes mentioned in Annex II Habitats Directive occur in this area: Aspius Aspius, Spined Loach, Golden Spined Loach, Brook Lamprey, Ukrainian Brook Lamprey, Weatherfish, European Bitterling.

Protection
The area is covered by following forms of nature conservation: Nature Reserves: Majdan (50,6 ha) Sokol (116,6 ha) Tomczyce (58,5 ha) Zadlowice (138,8 ha) Spalski Landscape Park (12875,0 ha) Protected Landscape Areas: Dolina Pilicy and Drzewiczki Piliczańsko-Radomszczański.