6 ▁metres ▁high ▁in ▁the ▁literature , ▁but ▁is ▁ 3 , 2 8 8 ▁metres ▁high ▁according ▁to ▁the ▁Federal ▁Office ▁for ▁Metro log y ▁and ▁Survey . ▁The ▁south ▁sum mit ▁( S üd g ip fel ), ▁by ▁contrast , ▁is ▁only ▁ 3 , 2 7 0 ▁metres ▁high . ▁The ▁two ▁pe aks ▁are ▁about ▁ 3 0 0 ▁metres ▁apart . ▁They ▁appear ▁from ▁the ▁north ▁as ▁a ▁stub by , ▁cone - sh aped , ▁fir n - cover ed ▁d ome , ▁but ▁from ▁the ▁east ▁as ▁a ▁forb idd ing , ▁dark ▁rock ▁face . ▁Sh arp , ▁prominent ▁rid ges ▁radi ate ▁from ▁the ▁pe aks ▁to ▁the ▁n ortheast ▁and ▁south west , ▁along ▁the ▁main ▁cr est ▁of ▁the ▁mountain ▁range . ▁The ▁tw in ▁pe aks ▁are ▁the ▁highest ▁points ▁in ▁the ▁summer ▁ski ing ▁area ▁of ▁the ▁Hinter t ux ▁Gla cier ▁and , ▁since ▁the ▁end ▁of ▁the ▁ 1 9 9 0 s , ▁have ▁been ▁accessible ▁from ▁Hinter t ux ▁on ▁cable ▁cars ▁and ▁ski ▁lif ts ; ▁which ▁makes ▁them ▁a ▁popular ▁destination ▁for ▁day ▁tri ppers . ▁The ▁north ▁sum mit ▁was ▁first ▁conquer ed ▁in ▁ 1 8 6 7 ▁by ▁Dr .   Ber re itter , ▁the ▁south ▁sum mit ▁on ▁ 7 ▁September ▁ 1 8 7 2 ▁by ▁the ▁brothers , ▁Max ▁and ▁Richard ▁von ▁Fre y ▁from ▁Sal zburg . ▁ ▁S urr ounding ▁area ▁ ▁The ▁Gef