Horatio Walker was born in Listowel, Ontario in 1858. He studied at Toronto's Notman-Fraser photographic studios before moving to the United States.
He was a member of the Canadian Art Club beginning in 1908, and The Royal Canadian Arts Academy.
Walker often painted scenes inspired by his time spent on Ile d'Orléans, Québec.
He died in Ste-Pétronille, Québec in 1938.