Martin ; ▁▁ ▁north - east , ▁to ▁its ▁mouth . ▁ ▁The ▁G auth ier ▁River ▁flows ▁into ▁the ▁bottom ▁of ▁a ▁small ▁bay ▁of ▁ ▁on ▁the ▁south ▁bank ▁of ▁the ▁S ag uen ay ▁River ▁( B att ures ▁aux ▁L oups ▁Mar ins ), ▁in ▁the ▁sector ▁of ▁La ▁Ba ie , ▁either ▁on ▁the ▁west ▁of ▁" Po inte ▁à ▁G onie ". ▁This ▁confl u ence ▁is ▁located ▁at : ▁▁ ▁of ▁the ▁north ▁bank ▁of ▁the ▁S ag uen ay ▁River ▁( at ▁a ▁height ▁between ▁the ▁rivière ▁à ▁la ▁L out re ▁and ▁rivière ▁aux ▁Out ard es ); ▁▁ ▁north - east ▁of ▁dow nt own ▁S ag uen ay ; ▁▁ ▁north ▁of ▁the ▁Bag ot ville ▁Airport ▁terminal ; ▁▁ ▁north - west ▁of ▁the ▁confl u ence ▁of ▁the ▁rivière ▁à ▁Mars ▁and ▁the ▁Ba ie ▁des ▁Ha ! ▁Ha ! ▁▁ ▁north - west ▁of ▁the ▁mouth ▁of ▁the ▁Ha ! ▁Ha ! ▁River . ▁ ▁From ▁the ▁confl u ence ▁of ▁the ▁G auth ier ▁river ▁with ▁the ▁S ag uen ay ▁River , ▁the ▁current ▁follows ▁the ▁course ▁of ▁the ▁S ag uen ay ▁River ▁on ▁ ▁east ward ▁to ▁T ad ouss ac ▁where ▁it ▁mer ges ▁with ▁the ▁Saint ▁Lawrence ▁Est u ary . ▁ ▁Top onym y ▁ ▁The ▁term ▁" G auth ier " ▁is ▁a ▁family ▁name ▁of ▁French ▁origin . ▁ ▁The ▁to pon ym ▁" R iv ière ▁G auth ier