On July 31, 2018, Mars will be closer to Earth than it has been in 15 years. Technically, this is called opposition, and the distance will be 35.7 million miles (57.6 million kilometers.) Look south in the late evening, to the west of the constellation Sagittarius, to see the dazzling red planet. Even a small telescope will bring out some details, polar hood, etc. And check with your local planetarium for a special observation event. This NASA doc has the details.
Image Credit: Nasa