George Frederick Ruxton (24 July 1821 – 29 August 1848) was a British explorer and travel writer. He was a Lieutenant in the British Army, received a medal for gallantry from Queen Isabella II of Spain, was a hunter and explorer and published papers and books about his travels to Africa, Canada, Mexico and the United States.
He observed the westward expansion of the United States in the 1840s during the period when the country's government was pursuing its policy of manifest destiny. He was the first author to write "extensively" of the mountain men of the Rocky Mountains.
George Frederick Augustus Ruxton, or George Augustus Frederick Ruxton, was born to Anna Maria Hay Ruxton and John Ruxton, Esquire near Oxfordshire, England. His maternal grandfather was Colonel Patrick Hay, a descendent of the house of Tweeddales. Ruxton attended Turnbridge School and began his education at Royal Military Academy Sandhurst, but left before receiving his commission.
He had an adventuresome spirit: "I was a vagabond in all my propensities. Everything quiet or commonplace I detested and my spirit chafed within me to see the world and participate in scenes of novelty and danger."
He was a soldier during a Spanish Civil War, 1833–39 at the age of 17. He became a lancer under Diego de León and received the Laureate Cross of Saint Ferdinand from Queen Isabella II for his gallantry at Belascoáin.
He then served in the 89th (The Princess Victoria's) Regiment of Foot in Canada. Intrigued by the lives of Native Americans and trappers on the open prairie, Ruxton sold his Lieutenant commission in the British Army and became a hunter in Upper Canada.