The Thuringian Forest Nature Park extends over the area around the Rennsteig in the Thuringian Forest, in the High Thuringian Slate Mountains with the Schwarzatal and on the western flank of the Franconian Forest between Eisenach in the northwest and Sonneberg in the southeast. It includes, among other things, the so-called dam region around the Alte Gothaer dam (also called Tambach-Dietharz dam), the Schmalwasser, Ohra and Lütschetalsperre, the Erletor dam, the Schönbrunn dam at the transition from the Thuringian Forest to the slate mountains, but also that Schwarzatal with the Scheiben-Alsbach dam and the Goldisthal pumped storage plant and the Lichtetal with the Leibis-Lichte drinking water dam.
The 170 km² Vessertal-Thuringian Forest biosphere reserve is enclosed by the nature park.
The highest elevations in the Thuringian Forest Nature Park are the Große Beerberg (982 m above sea level) and the Schneekopf (978 m above sea level) in the Thuringian Forest.
The Great Farmdenkopf in the Thuringian Slate Mountains reaches 869 m above sea level. NN, the mountain peaks Kieferle (867 m above sea level) and Bleßberg (865 m above sea level) are almost the same height.
The Thuringian Forest Nature Park is directly connected to the Franconian Forest and Thuringian Slate Mountains-Obere Saale nature parks.
Together the three nature parks form a closed nature park area with approx. 4,000 km².
(Source: Wikipedia)