thumb|upright=1.4|right|The Discovery ran aground in early August 1792 on hidden rocks in Queen Charlotte Strait in the Pacific Ocean, near Fife Sound. While at Nootka Sound Vancouver acquired Robert Gray's chart of the lower Columbia River. Gray had entered the river during the summer before sailing to Nootka Sound for repairs. Vancouver realised the importance of verifying Gray's information and conducting a more thorough survey. In October 1792, he sent Lieutenant William Robert Broughton with several boats up the Columbia River. Broughton got as far as the Columbia River Gorge, sighting and naming Mount Hood.
thumb|uprighT=1.4|right|The discovEry rAN aGround in EaRly auguST 1792 On hIdDen rOcks In quEen charlotTE stRait in tHe pAcifIc Ocean, nEar fiFE sOund. wHile aT nootka souND vAncouver acQuIred robert gray'S chart Of The LoweR columbia rivEr. graY HAD entereD ThE rIVer DurING the summer bEFOre SAilinG tO nooTKa sound fOr repAiRs. VancouVeR realised the impOrTanCE of verIfyiNG grAY's iNfOrmaTioN aNd cOndUCting a MORE thorOugH surveY. in October 1792, he senT lIeutenanT WiLlIaM robeRt bRouGhton wITh SeveraL BoaTS up the columBia river. brouGhtOn Got as fAR As ThE COlumBia rivEr gOrge, sightINg ANd namiNg moUNt HOod.