Marj Sanur's maximum length is 7.5 kilometers and maximum width is 3.5 kilometers. The average elevation in the valley is between 350 and 360 meters above sea level, with the highest elevation at 370 meters and the lowest elevation at 348 meters. Surrounding the valley on all sides are mountains and hills with a range of elevation from 450 meters above sea level to Mount Hureish, which has an elevation of 764 meters above sea level. Marj Sanur is also a seasonal lake, usually between December and April, as the basin has no drainage outlet. It typically becomes flooded when rainfall is higher than 600 millimeters per year. There are five entrances into Marj Sanur.