Alfredo Arévalo Reyes (born February 20, 1976) is a Guatemalan marathon runner. In 2004, he achieved both his personal best and a national record-breaking time of 2:12:53 at the National Capital Marathon in Ottawa, Ontario, Canada. Arevalo made his official debut for the 2004 Summer Olympics in Athens, where he finished seventy-seventh in the men's marathon, outside his personal best of 2:34:02.