▁end ▁up ▁gathered ▁into ▁the ▁fol d ▁of ▁the ▁San ▁Gabriel ▁Mission ▁and ▁with ▁other ▁bands ▁and ▁tribes ▁collect ively ▁called ▁" G ab ri elen os ." ▁ ▁The ▁Ar roy o ▁Sec o ▁region ▁can ▁be ▁considered ▁by ▁historical ▁accounts ▁as ▁the ▁birth place ▁of ▁Pas ad ena . ▁After ▁the ▁ 1 8 2 0 s ▁sec ular ization ▁of ▁the ▁Miss ions , ▁the ▁broad ▁area ▁to ▁the ▁east ▁of ▁the ▁Ar roy o ▁was ▁the ▁Mexican ▁land ▁grant ▁of ▁Ran cho ▁San ▁P asc ual , ▁present - day ▁Pas ad ena , ▁California . ▁Manuel ▁Gar f ias ▁was ▁the ▁gran te e ▁of ▁the ▁Ran cho ▁and ▁its ▁longest ▁early ▁resident . ▁His ▁ad obe ▁house ▁was ▁on ▁the ▁east ▁r idge ▁of ▁the ▁Ar roy o , ▁in ▁present - day ▁South ▁Pas ad ena . ▁ ▁With ▁the ▁ 1 8 7 4 ▁establishment ▁of ▁the ▁community ▁of ▁the ▁Indiana ▁Col ony , ▁the ▁new ▁residents ▁built ▁their ▁homes ▁along ▁today ' s ▁Orange ▁Gro ve ▁Bou lev ard , ▁the ▁major ▁north - s outh ▁a venue ▁par alle ling ▁the ▁Ar roy o ▁on ▁the ▁east . ▁However , ▁the ▁deep ▁and ▁season ally ▁flo oded ▁Ar roy o ▁presented ▁a ▁bar rier ▁to ▁easy ▁travel ▁and ▁transport ation ▁between ▁renamed ▁Pas ad ena ▁and ▁Los ▁Angeles . ▁St ories ▁of ▁four ▁and ▁five ▁hours ▁just ▁crossing ▁the ▁ch asm , ▁whether ▁ex agger ated ▁or ▁not , ▁ab ounded ▁in ▁Pas