McLean was born in 1805 in Tobermory, Isle of Mull, Scotland to Christina and Alexander McLean. In 1812 Donald and his family left Scotland to join Selkirk's Red River Settlement, in what became Manitoba, Canada. There they struggled to survive in an inhospitable land surrounded by conflict. Alexander McLean was killed at the Battle of Seven Oaks on June 19, 1816 and what remained of the original settler's disbanded. Donald, his siblings and his mother returned to Scotland. He joined the Hudson's Bay Company in 1833 as an apprentice clerk in the company's Western Department. In 1835 he was with expeditions to the Snake River country west of the Rockies led by Thomas McKay and John McLeod. He was assigned to Fort Colville, under Chief Trader Archibald McDonald in 1839, and in 1840 was transferred to Flathead Post. Two years later, he was sent to the New Caledonia Fur District in now north-central British Columbia, and was, at different times, in charge of Forts Chilcotin, Babine, and McLeod. He also worked at Fort Alexandria under Donald Manson. McLean was appointed Chief Trader in 1853, taking charge of Thompson's River Post in 1855, expanding its cattle and horse herds and managing unruly relations with indigenous peoples sternly, acquiring a reputation both for fairness and severity. It was during McLean's rule of the post that the first finds of gold were brought into the fort by local native peoples. The news which was carefully guarded, but eventually touched off the Fraser River Gold Rush. McLean was known as "Samadlin" to his indigenous customers and friends, which is a corruption of Sieur McLean, which is how he was addressed by his French-Canadian underlings at the fur posts.. McLean's brutal practices - he was an adherent of an informal company policy known as "Club Law" - and various insubordinations led to him being called to company regional headquarters in Victoria in 1860 and ultimately to his resignation in 1861. During his tenure at Thompson's River Post, McLean had established a ranch in the hills northwest of Cache Creek. He now moved there with his family, ranching, prospecting, and running a roadhouse on the Cariboo Road at Lower Hat Creek. McLean came out of retirement during the Chilcotin War of 1864 to assist in the hunt for Klattasine. Chafing at being under the putative command of Cox, who was in charge of non-military forces in the campaign, McLean set out from the expedition's encampment near Puntzi Lake on his own to track Klattasine through the country around Chilko and Taseko Lakes. Klattasine targeted McLean for death based on his brutal "club law" treatment of Tsilhqot'in people, as well as his treachery in revealing Tsilhqot'in trails to Cox's militia groups. Klattasine lured McLean away from the camp near Choelquoit Lake. Nezunlhtsin, a Tsilhqot'in warrior, shot and killed McLean on July 17, 1864, when McLean opened his steel mesh vest to cool off. Klattasine was surprised at how easily McLean had been killed because of a reputation for invincibility. Donald McLean's grave site is located in the Chilcotin near to where he was killed.
Legacy
McLean's ranch, now known as Hat Creek Ranch still stands near Cache Creek as a historical attraction. Named for him are McLean Lake and Mount McLean, the highest summit on Mission Ridge on the north side of Seton Lake just west of Lillooet. Donald McLean was married three times, fathering 11 children. In the decade after his death, McLean's son by his third wife, Sophia, Allan McLean, went on a rampage with his brothers Charley and Archie and a friend, Alex Hare, through the Nicola Country, killing settler and gold commissionerJohn Tannatt Ussherin cold blood. Allen, his brothers and Alex Hare were captured and brought to the British Columbia Penitentiary for trial by Chief Justice Matthew Baillie Begbie, were convicted in 1879 and hung for murder in 1881. George McLean, a son of one of the "Wild McLean Boys" was decorated in 1917 for bravery for single-handedly killing 19 Germans at Vimy Ridge. Alexander McLean, Donald's youngest son with his first wife, Ali, owned and ran Black Pine Ranch in northern Kamloops, British Columbia. Among McLean's many descendants, Mel Rothenburger, former mayor of Kamloops, is a writer in BC history, including a book on The Chilcotin War and another about "The Wild McLeans"