ag ami . ▁ ▁From ▁the ▁head ▁lake , ▁the ▁O mo ▁River ▁flows ▁on ▁ ▁in ▁the ▁Ass in ica ▁Wild life ▁San ctu ary , ▁according ▁to ▁the ▁following ▁segments : ▁ ▁Top onym y ▁ ▁The ▁to pon ym ▁" M ons an ▁River " ▁was ▁formal ized ▁on ▁December ▁ 5 , ▁ 1 9 6 8 , ▁at ▁the ▁Commission ▁de ▁to pon ym ie ▁du ▁Québec , ▁i . e . ▁at ▁the ▁creation ▁of ▁this ▁commission ▁ ▁Upper ▁part ▁of ▁the ▁O mo ▁River ▁( segment ▁of ▁) ▁▁ ▁w ester ly ▁crossing ▁an ▁un ident ified ▁lake ▁( length : ▁; ▁alt itude : ▁), ▁then ▁to ▁the ▁South ▁crossing ▁a ▁second ▁un ident ified ▁lake ▁( length : ▁; ▁alt itude : ▁), ▁to ▁a ▁cre ek ▁( coming ▁from ▁the ▁N ortheast ); ▁ ▁south w ester ly , ▁crossing ▁an ▁un ident ified ▁lake ▁( length : ▁; ▁alt itude : ▁), ▁up ▁to ▁at ▁its ▁mouth ; ▁ ▁to ▁the ▁South west , ▁then ▁crossing ▁an ▁un ident ified ▁lake ▁( length : ▁; ▁alt itude : ▁) ▁to ▁at ▁its ▁mouth ; ▁ ▁south w ester ly ▁to ▁a ▁bay ▁on ▁the ▁eastern ▁shore ▁of ▁Lake ▁O mo ; ▁ ▁south w ester ly , ▁crossing ▁O mo ▁Lake ▁( e lev ation : ▁) ▁over ▁its ▁full ▁length ; ▁ ▁Lower ▁part ▁of ▁the ▁O mo ▁River ▁( segment ▁of ▁) ▁▁ ▁to ▁the ▁S out heast , ▁crossing