When is Mars Closest to Earth?

Mars is at its closest to Earth during a point called perihelion. Usually, because of the difference in orbits, perihelion will occur when both planets are at opposition, or on opposite sides. The closest Mars has ever come to Earth was on August 27, 2003, when it was only 34,646,418 miles away. This is the closest the red planet has been to Earth in 60,000 years.