etch ab un ▁Range ▁is ▁mentioned ▁as ▁the ▁" Ph ang ▁H oe i ▁Range " ▁in ▁some ▁ge ographical ▁works , ▁a ▁name ▁that ▁en comp ass es ▁the ▁whole ▁northern ▁section ▁of ▁the ▁D ong ▁Ph aya ▁Y en ▁mountain ▁system , ▁for ▁K ha o ▁Ph ang ▁H oe i ▁is ▁a ▁ 1 , 0 0 8 ▁m ▁high ▁sum mit ▁west ▁of ▁Ch ai y aph um ▁town , ▁beyond ▁the ▁southern ▁end ▁of ▁the ▁Ph etch ab un ▁Range ▁proper ▁in ▁the ▁northern ▁half ▁of ▁the ▁D ong ▁Ph aya ▁Y en . ▁ ▁The ▁D ong ▁Ph aya ▁Y en ▁range ▁div ides ▁the ▁Ch ao ▁Ph ray a ▁river ▁valley ▁of ▁central ▁Th ailand ▁and ▁the ▁K hor at ▁Pl ate au ▁of ▁the ▁n ortheast . ▁The ▁mountains ▁are ▁dra ined ▁to ▁the ▁east ▁by ▁several ▁trib ut aries ▁to ▁the ▁Chi ▁and ▁the ▁Mun ▁and ▁to ▁the ▁west ▁by ▁trib ut aries ▁of ▁the ▁Pa ▁Sak ▁River . ▁ ▁History ▁This ▁whole ▁mountain ous ▁region ▁was ▁covered ▁by ▁thick ▁forest ▁and ▁was ▁formerly ▁known ▁as ▁D ong ▁Ph aya ▁F ai ▁or ▁" j ung le ▁of ▁the ▁fire ▁lord ". ▁There ▁were ▁no ▁roads , ▁hence ▁it ▁was ▁not ▁possible ▁to ▁use ▁a ▁cart . ▁Tra vel ▁across ▁the ▁forest ▁had ▁to ▁be ▁on ▁foot ▁or ▁using ▁pal an qu ins . ▁The ▁whole ▁area ▁was ▁re put ed ▁to ▁be ▁un he alth y ▁and ▁travel ers ▁who ▁d ared ▁to