▁Le cco ▁sit ▁at ▁the ▁ends ▁of ▁the ▁south western ▁and ▁sout he astern ▁branches ▁respectively . ▁The ▁small ▁towns ▁of ▁Bell ag io , ▁Men aggio ▁and ▁L ier na ▁are ▁situated ▁at ▁the ▁intersection ▁of ▁the ▁three ▁branches ▁of ▁the ▁lake : ▁a ▁tri angular ▁boat ▁service ▁oper ates ▁between ▁them . ▁ ▁Lake ▁Como ▁is ▁fed ▁primarily ▁by ▁the ▁Add a ▁River , ▁which ▁enters ▁the ▁lake ▁near ▁Col ico ▁and ▁flows ▁out ▁at ▁Le cco . ▁This ▁ge ological ▁con formation ▁makes ▁the ▁south western ▁branch ▁a ▁dead ▁end , ▁and ▁so ▁Como , ▁unlike ▁Le cco , ▁is ▁often ▁flo oded . ▁ ▁The ▁mountain ous ▁pre - al pine ▁territory ▁between ▁the ▁two ▁southern ▁arms ▁of ▁the ▁lake ▁( between ▁Como , ▁Bell ag io , ▁and ▁Le cco ) ▁is ▁known ▁as ▁the ▁Lar ian ▁Tri angle , ▁or ▁Tri ang olo ▁lar iano . ▁The ▁source ▁of ▁the ▁river ▁Lamb ro ▁is ▁here . ▁At ▁the ▁centre ▁of ▁the ▁triangle , ▁the ▁town ▁of ▁Can zo ▁is ▁the ▁seat ▁of ▁the ▁Comun ità ▁mont ana ▁del ▁Tri ang olo ▁lar iano , ▁an ▁association ▁of ▁the ▁ 3 1 ▁municipal ities ▁that ▁represent ▁the ▁ 7 1 , 0 0 0 ▁inhabitants ▁of ▁the ▁area . ▁ ▁Cl imate ▁Lake ▁Como ▁weather ▁is ▁hum id ▁subt rop ical ▁( C fa ▁in ▁the ▁Kö ppen ▁climate ▁classification ). ▁In ▁the ▁winter , ▁the ▁lake ▁helps ▁to ▁maintain ▁a ▁higher ▁temperature ▁in ▁the ▁surrounding ▁region .