▁lake ▁in ▁Bel arus ▁( in ▁ 1 9 2 1 – 3 9 ▁it ▁was ▁the ▁largest ▁lake ▁of ▁Poland ). ▁ ▁Nar ach ▁is ▁a ▁part ▁of ▁the ▁Nar ach ▁lake ▁group ▁( the ▁others ▁being ▁Mi ast ra ▁( ), ▁B atory n ▁( ), ▁B led na je ▁( ). ▁It ▁was ▁formed ▁about ▁ 1 1 ▁thousand ▁years ▁ago ▁after ▁the ▁Ple ist oc ene ▁ice ▁ages . ▁It ▁has ▁a ▁surface ▁area ▁of ▁ 7 9 . 6   km 2 , ▁a ▁wider ▁length ▁of ▁ 1 2 . 8   km , ▁a ▁maximum ▁depth ▁of ▁ 2 4 . 8 ▁m , ▁average ▁depth ▁of ▁ 8 . 9 ▁m , ▁a ▁volume ▁of ▁ 7 1 0 ▁million ▁cub ic ▁meters . ▁The ▁lake ▁is ▁surrounded ▁with ▁p ine ▁for ests . ▁The ▁Nar ach ▁River ▁flows ▁out ▁of ▁it . ▁ ▁Nar ach ▁is ▁an ▁ab ode ▁of ▁ 2 2 ▁gener a ▁of ▁fish , ▁as ▁the ▁e el , ▁pi ke , ▁bur bot , ▁etc . ▁The ▁shore ▁and ▁is lets ▁are ▁nested ▁by ▁different ▁birds , ▁as ▁the ▁m ute ▁sw an , ▁fish ▁ha w k , ▁tar rock , ▁d ab ch ick . ▁ ▁History ▁People ▁settled ▁near ▁the ▁lake ▁about ▁ 1 0 ▁thousand ▁years ▁ago . ▁L ingu ists ▁think ▁that ▁its ▁name ▁is ▁probably ▁from ▁the ▁Ind o - Europe an ▁root ▁* nar - ▁often ▁found ▁in ▁names ▁of ▁bodies ▁of