stein ▁lim estone , ▁a ▁re ef ▁lim estone , ▁domin ates ▁the ▁main ▁part ▁of ▁the ▁T ann heim ▁Mountains . ▁This ▁is ▁a ▁solid ▁rock . ▁As ▁a ▁result , ▁the ▁T ann heim ▁Mountains , ▁with ▁their ▁well ▁known ▁pe aks , ▁the ▁R ote ▁Fl üh , ▁G imp el , ▁Kö ll ens pit ze ▁and ▁Ge hr ens pit ze , ▁are ▁a ▁ren owned ▁clim bing ▁area . ▁The ▁sub range ▁is ▁also ▁popular ▁with ▁mountain ▁h ik ers . ▁Es pecially ▁in ▁the ▁early ▁summer , ▁when ▁the ▁main ▁chain ▁of ▁the ▁All g äu ▁Al ps ▁is ▁still ▁snow - cover ed , ▁there ▁are ▁many ▁paths ▁here ▁that ▁are ▁already ▁pass able . ▁ ▁Fal ken stein ▁r idge ▁▁ ▁The ▁Fal ken stein ▁r idge ▁( K amm ▁des ▁Fal ken ste ins ) ▁is ▁a ▁very ▁small ▁and ▁not ▁especially ▁high ▁subgroup ▁on ▁the ▁n ortheast ▁edge ▁of ▁the ▁All g äu ▁Al ps ▁between ▁P front en ▁and ▁F üssen . ▁Loc ally ▁it ▁is ▁called ▁the ▁Fal ken ste ink amm ▁or ▁even ▁the ▁Z irm gr at . ▁The ▁V ils ▁river ▁separ ates ▁the ▁sub range ▁from ▁the ▁T ann heim ▁Mountains . ▁On ▁the ▁far ▁side ▁of ▁the ▁River ▁Le ch ▁are ▁the ▁Am mer g au ▁Al ps . ▁ ▁The ▁highest ▁peak ▁is ▁the ▁Sal ober ▁or ▁Zw öl fer k opf ▁( also ▁Z irm gr at ),   ( 1 , 2