Arakhley lake has a roughly oval shape. It is located in the
Beklemishev Depression, at the southeastern end of the
Vitim Plateau, west of
Chita, Zabaykalsky Krai and lake
Kenon. It is separated from neighboring
Lake Shaksha by a low, wide
landspit. It is part of the
Ivan-Arakhley Lake System (), which includes 6 large lakes and about 20 smaller ones. Arakhley is the largest of the group and it is also the lake having the greatest depth. There are two small rivers flowing into the lake, the Domka and the Gryaznukha, also known as Shaborta. The Kholoy stream flows out of the lake into Lake Shaksha. The catchment area of the lake belongs to the
Khilok river basin, a tributary of the
Selenga. ==Flora and fauna==