▁closed ▁from ▁mid ▁March ▁until ▁June ▁ 1 . ▁ ▁Geography ▁ ▁O ro graph y ▁The ▁southern ▁part ▁of ▁the ▁municipality , ▁some ▁ 5 9 % ▁of ▁the ▁total ▁area , ▁is ▁flat . ▁The ▁Sierra ▁de ▁O cot lán ▁( or ▁Cer ro ▁Fr ío ) ▁is ▁on ▁the ▁southern ▁border ; ▁its ▁main ▁height s ▁are : ▁Cer ro ▁del ▁Vel ad ero , ▁el ▁Som br er ito , ▁and ▁el ▁Pic ach o ▁at ▁ 1 , 2 5 0 ▁meters ▁( 4 , 1 0 1 ▁ft .) ▁each . ▁North ▁of ▁Te ac al co ▁is ▁the ▁Cer ro ▁de ▁los ▁A jon j ol í es ▁and ▁the ▁Cer ro ▁de ▁los ▁Cor ral es ▁at ▁ 1 , 2 5 9 ▁meters ▁( 4 , 1 3 1 ▁ft .). ▁ ▁R ivers ▁& ▁W aters ▁Water ▁resources ▁of ▁Am ac uz ac ▁consist ▁basically ▁of ▁the ▁Rio ▁Sal ado , ▁which ▁passes ▁through ▁Cas ahu at lán ▁and ▁Co ah ui xt la . ▁The ▁Am ac uz ac ▁River ▁runs ▁along ▁part ▁of ▁the ▁border ▁of ▁the ▁municipality , ▁fed ▁by ▁the ▁stream ▁from ▁the ▁Bar ran ca ▁de ▁X o apa , ▁which ▁has ▁its ▁source ▁in ▁the ▁municipality ▁of ▁T et ec ala . ▁The ▁Am ac uz ac ▁River ▁begins ▁in ▁the ▁town ▁of ▁C ac ahu amil pa , ▁Gu err ero , ▁at ▁the ▁j unction ▁of ▁Río ▁Ch ont aco at lán ▁and ▁ ▁Río