resp í ▁was ▁the ▁one ▁who ▁reached ▁Su is un ▁Bay ▁in ▁ 1 7 7 2 . ▁During ▁this ▁visit , ▁C resp í ▁called ▁the ▁San ▁Jo aqu in ▁River ▁" El ▁Rio ▁de ▁San ▁Francisco ", ▁a ▁name ▁that ▁was ▁not ▁used ▁widely ▁due ▁to ▁the ▁river ' s ▁rem oten ess ▁but ▁pers isted ▁until ▁the ▁early ▁ 1 9 th ▁century . ▁ ▁In ▁the ▁aut umn ▁of ▁ 1 7 7 2 ▁F ages ▁set ▁out ▁from ▁Mission ▁San ▁Luis ▁Ob is po ▁de ▁Tol osa ▁in ▁purs uit ▁of ▁deser ters ▁from ▁the ▁Spanish ▁army , ▁and ▁tra ve led ▁east ▁then ▁north ▁over ▁the ▁Te h ach api ▁Mountains ▁through ▁Te j ón ▁Pass , ▁which ▁today ▁car ries ▁Inter state ▁ 5 ▁into ▁the ▁San ▁Jo aqu in ▁valley . ▁After ▁crossing ▁the ▁mountains , ▁he ▁came ▁upon ▁the ▁shore ▁of ▁Bu ena ▁V ista ▁Lake ▁at ▁the ▁southern ▁end ▁of ▁the ▁San ▁Jo aqu in ▁Valley , ▁and ▁gave ▁the ▁name ▁Bu ena ▁V ista ▁(" be aut iful ▁view ") ▁to ▁the ▁pass ▁and ▁a ▁nearby ▁Native ▁American ▁village . ▁However , ▁F ages ▁did ▁not ▁vent ure ▁farther ▁north , ▁and ▁thus ▁did ▁not ▁further ▁explore ▁the ▁main ▁stem ▁of ▁the ▁San ▁Jo aqu in ▁River . ▁ ▁The ▁San ▁Jo aqu in ▁River ▁region ▁remained ▁largely ▁unknown ▁except ▁for ▁the ▁fact ▁of ▁its ▁existence ▁until ▁ 1 8 0 6 , ▁when ▁Spanish ▁expl orer ▁Gabriel ▁Mor aga ▁led ▁the