▁Wes er geb ir ge ▁and ▁the ▁Te ut ob urg ▁Forest ▁in ▁the ▁east , ▁the ▁S auer land , ▁the ▁Berg isches ▁Land , ▁the ▁Sie ger land ▁and ▁the ▁Sie ben geb ir ge ▁in ▁the ▁south , ▁as ▁well ▁as ▁the ▁left - R hen ish ▁E if el ▁in ▁the ▁south west ▁of ▁the ▁state . ▁The ▁Roth aar geb ir ge ▁in ▁the ▁border ▁region ▁with ▁H esse ▁r ises ▁to ▁height ▁of ▁about ▁ 8 0 0 ▁m ▁above ▁sea ▁level . ▁The ▁highest ▁of ▁these ▁mountains ▁are ▁the ▁Lang enberg , ▁at ▁ 8 4 3 . 2 ▁m ▁above ▁sea ▁level , ▁the ▁K ah ler ▁A sten ▁( 8 4 0 . 7 ▁m ) ▁and ▁the ▁C lem ens berg ▁( 8 3 9 . 2 ▁m ). ▁ ▁The ▁plan imet r ically - det erm ined ▁centre ▁of ▁North ▁Rh ine - West phal ia ▁is ▁located ▁in ▁the ▁south ▁of ▁Dort mund - A pler beck ▁in ▁the ▁A pler be cker ▁Mark ▁( 5 1 ° ▁ 2 8 ' ▁N , ▁ 7 ° ▁ 3 3 ' ▁Ö ). ▁Its ▁western most ▁point ▁is ▁situated ▁near ▁Self k ant ▁close ▁to ▁the ▁Dutch ▁border , ▁the ▁eastern most ▁near ▁Hö xter ▁on ▁the ▁Wes er . ▁The ▁southern most ▁point ▁lies ▁near ▁Hell ent hal ▁in ▁the ▁E if el ▁region . ▁The ▁northern most ▁point ▁is ▁the ▁NR W - N ord punkt ▁near ▁Rah