長壽湖(hu)(hu)又名(ming)九(jiu)(jiu)號(hao)泡子,是一處天然湖(hu)(hu)泊(bo)。位于內蒙(meng)(meng)古自(zi)治區呼倫貝(bei)爾(er)市(shi)牙克石市(shi)烏(wu)奴耳鎮東(dong)南13公(gong)(gong)里處,免渡河二級支流九(jiu)(jiu)號(hao)泡子河左岸,地理坐標為(wei)東(dong)經121°19′41″,北(bei)(bei)緯48°45′14″,海(hai)拔826米(mi)。湖(hu)(hu)面呈較為(wei)規則的圓形(xing),最大寬度400米(mi),面積11公(gong)(gong)頃(qing),九(jiu)(jiu)號(hao)泡子河貫通湖(hu)(hu)泊(bo),東(dong)進北(bei)(bei)出,可調節湖(hu)(hu)中水量。內蒙(meng)(meng)古烏(wu)奴耳長壽湖(hu)(hu)國家濕(shi)地公(gong)(gong)園(試點(dian))位于內蒙(meng)(meng)古自(zi)治區呼倫貝(bei)爾(er)市(shi)烏(wu)奴耳林業(ye)局,總面積8546公(gong)(gong)頃(qing)。