Sartai Regional Park was established in 1992 at the turn of the Rokiškis and Zarasai districts. The park is very valuable for hydrographic, biological, recreational, cultural and geomorphological purposes. The part of the territory of the Sartai Regional Park located in the Rokiškis district includes the Mielėnai Geomorphologic Preserve for the preservation of the relief of the hilly, abandoned and lake. The Sartai hydrographic reserve is dedicated to preserving the longest lake of Sartai with deep bays, peninsulas, islands and outcrops, wildlife and vegetation, and protect coastal mounds. Salinis Hydrographic Reserve, intended for the preservation of the Salinis, Tautesnis and Ilgelis lakes with islands, which are typical of the Sėliai uplands and flow through the western slope.
- regional park area 12107 ha, buffer zone – 580 ha;
- 1 natural reserve, 10 preserves (1 geomorphological, 1 urban, 2 botanical – zoological, 3 landscapes, 3 hydrographic).
- 29% forests;
- 38,5% of agricultural land;
- 16.5% 29 lakes;
- 7.1% of the marsh;
- 2.2% of the settlement;
- 6.7% other.
- 4 largest in Lithuania – 1336 ha;
- coastline for 79 km (the longest in Lithuania);
- the deepest place is 21,9 m;
- maximum width 0,95 km;
- maximum length 14.78 km;
- the highest point at 162 m above sea level – in the Hermetic Geomorphological Reserve;
- the lowest point of the water surface of Lake Sartes is 100 m above sea level.
Protected natural and cultural heritage objects, species, habitats:
- 4 natural heritage objects (trees), one of them, Bradesiai grove – a natural monument;
- 48 cultural heritage objects (17 archeological, 7 architectural, 2 greenhouses, 10 historical, 9 memorial, 3 art), 2 of them are cultural monuments;
- 120 species written in the Lithuanian Red Book (36 plants, 34 mushrooms and lichens, 21 invertebrates, 3 frogs, 24 birds, 2 mammals);
- 2 plant communities registered in the Lithuanian Red Data Book (Slice of Birch and Large Polecule);
- 15 Natura 2000 sites containing 19 habitat types of importance for the European Community and 6 species of plants and animals.
Recreational Facilities and Points of Interest:
- 3 cognitive trails, 12 campsites, 4 breathing points, 1 tower;
- 3 museums, 1 art gallery;
- 3 natural and 48 cultural heritage objects.