They are located between the Bistra Valley (to the south), Timiș River (to the east), Godeanu Mountains (to the northwest) and Râul Mare Valley (to the west), with the Râul Mare Valley serving as their natural border with the Retezat Mountains.
They were declared a Natura 2000 protected area in 2007 due to their unique biodiversity.
Together with the Retezat, Godeanu and Cerna [ro] mountains, they constitute the only intact forest landscape in Europe outside of Russia and Scandinavia.
Because of the Western climatic influences, the amount of rainfall in the Țarcu Mountains is quite high.
Snow may fall at altitudes above 1500 metres at any time in the year, while the snowpack usually lasts from October or November until June or even July in the glacial calderas of the highest peaks.