▁service ▁to ▁La ▁Por te , ▁the ▁head ▁of ▁navigation ▁from ▁Marcus , ▁Washington ▁Terr . ▁began ▁in ▁ 1 8 6 6 ▁( it ▁was ▁first ▁attempted ▁in ▁ 1 8 6 5 ).. ▁ ▁Most , ▁however , ▁came ▁via ▁a ▁water ▁route ▁from ▁the ▁foot ▁of ▁Kam lo ops ▁Lake , ▁just ▁east ▁of ▁Cache ▁Creek ▁and ▁so ▁near ▁the ▁main ▁tra ils ▁associated ▁with ▁the ▁F ras er ▁r ush ▁and ▁the ▁new ▁gold fields ▁being ▁found ▁north ▁in ▁the ▁Car ib oo . ▁ ▁From ▁there , ▁ste amer ▁services ▁travel led ▁from ▁Kam lo ops ▁Lake ▁via ▁Fort ▁Kam lo ops ▁and ▁up ▁the ▁South ▁Thompson ▁to ▁reach ▁Little ▁Sh us w ap ▁Lake ▁and ▁via ▁the ▁Little ▁River ▁to ▁Sh us w ap ▁Lake ▁( also ▁called , ▁especially ▁in ▁the ▁old ▁days , ▁Big ▁Sh us w ap ▁Lake ). ▁ ▁Sh us w ap ▁Lake ▁is ▁one ▁of ▁the ▁largest ▁la kes ▁in ▁southern ▁British ▁Columbia , ▁effectively ▁an ▁H - sh aped ▁series ▁of ▁four ▁fresh water ▁in lets , ▁the ▁n ortheast ▁arm ▁leading ▁to ▁the ▁mouth ▁of ▁the ▁short ▁but ▁powerful ▁Se ym our ▁River . ▁ ▁From ▁there , ▁a ▁few ▁passes ▁including ▁P ett ip ie ce ▁Pass ▁led ▁over ▁wide ▁cols ▁in ▁the ▁Mon as he e ▁Mountains ▁to ▁reach ▁the ▁Columbia , ▁where ▁other ▁ste amer ▁services ▁operated ▁to ▁the ▁bo om town ▁of ▁Big ▁B end ▁and ▁to ▁the ▁mouth s ▁of ▁the ▁Gold stream ▁River