The headwaters of the river rise in the Elizabeth and Catherine Range. The river flows in a north-westerly direction past the Whately Range and discharges into Maitland Bay then through George Water, into Doubtful Bay and finally the Indian Ocean.
The McRae River is a tributary of the Glenelg River.
The first recorded exploration of the river was made in 1838, by a party led by George Grey, but they were poorly prepared and ill-equipped. Grey named the river on 2 March 1838 after Lord Glenelg who was Secretary of State for the Colonies from 1835 to 1839 and under whose auspices Grey undertook his explorations.[2][3]
On 31 March 1929, en route from Sydney to England, the Southern Cross with Charles Kingsford Smith at the helm made an emergency landing on a mudflat near the mouth of the river. The Southern Cross was found and rescued after a fortnight's searching, with George Innes Beard, Albert Barunga and Wally from Kunmunya Mission the first overland party to reach the downed aircraft.[4]