Through this mountain ravine no water runs, except after heavy rains in the mountains round about Jerusalem. Its length from its head to en-Rogel is 2 3/4 miles. Its precipitous, rocky banks are filled with ancient tombs, especially the left bank opposite the temple area. The greatest desire of the Jews is to be buried there, from the idea that the Kidron is the "valley of Jehoshaphat" mentioned in Joel 3:2.
Below en-Rogel the Kidron has no historical or sacred interest. It runs in a winding course through the wilderness of Judea to the north-western shore of the Dead Sea. Its whole length, in a straight line, is only some 20 miles, but in this space its descent is about 3,912 feet.
Recent excavations have brought to light the fact that the old bed of the Kidron is about 40 feet lower than its present bed, and about 70 feet nearer the sanctuary wall.