The USAMO, or United States of America Mathematical Olympiad, is a prestigious mathematics competition for high school students in the United States. It serves as a qualifying round for the International Mathematical Olympiad and is known for its challenging problems that test students' problem-solving skills and mathematical creativity. The competition typically takes place annually in April and consists of a series of difficult problems that participants must solve within a limited time. Top scorers are often invited to join the USA Math Olympiad team, which represents the country in international competitions, showcasing the talents of young mathematicians.