istor ians ▁of ▁Francis can ▁history ▁Category : H istor ians ▁of ▁Mexico ▁Category : H istor ians ▁of ▁Mes o amer ica ▁Category : American ▁Mes o amer ican ists ▁Category : 2 0 th - century ▁Mes o amer ican ists <0x0A> </s> ▁The ▁W ail u ku ▁River ▁is ▁a ▁ ▁water ▁course ▁on ▁the ▁Island ▁of ▁Hawai i ▁in ▁the ▁Hawai ian ▁Islands . ▁It ▁is ▁the ▁longest ▁river ▁in ▁Hawai ' i ▁as ▁well ▁as ▁the ▁largest ▁in ▁the ▁state ▁by ▁mean ▁dis charge . ▁Its ▁course ▁lies ▁mostly ▁along ▁the ▁divide ▁between ▁the ▁la va ▁flows ▁ ▁of ▁Ma una ▁Ke a ▁and ▁those ▁of ▁Ma una ▁Lo a ▁to ▁the ▁south . ▁It ▁ar ises ▁at ▁about ▁the ▁ ▁elev ation ▁along ▁the ▁eastern ▁slope ▁of ▁Ma una ▁Ke a ▁( ). ▁It ▁flows ▁generally ▁east ward , ▁desc ending ▁ste ep ly ▁from ▁the ▁mountain ▁and ▁entering ▁the ▁Pacific ▁Ocean ▁at ▁H ilo . ▁ ▁W ail u ku ▁River ▁State ▁Park ▁is ▁located ▁along ▁the ▁lower ▁reach ▁of ▁the ▁river . ▁One ▁section ▁of ▁the ▁park ▁includes ▁Rain bow ▁F alls ▁( ), ▁and ▁another ▁section ▁P ee pe e ▁falls ▁and ▁an ▁area ▁called ▁the ▁Bo iling ▁P ots ▁( a ▁series ▁of ▁small ▁falls ▁and ▁po ols ). ▁The ▁upper ▁and ▁middle ▁reaches ▁of ▁the ▁river ▁are ▁known ▁for ▁hunting ▁of ▁introduced ▁game ▁animals . ▁The ▁lower ▁river ▁is ▁a ▁popular ▁destination ▁for ▁sw imming ▁and ▁tub ing . ▁However ▁the ▁W