It lies between Gilboa and Little Hermon on the East, and Mt. Carmel on the West. It is enclosed by irregular lines drawn from the latter along the base of the foothills of Nazareth to Tabor; from Tabor, skirting Little Hermon and Gilboa to Jenin, and from Jenin along the North edge of the Samaritan uplands to Carmel. These sides of the triangle are, respectively, about 15, 15 and 20 miles in length. North of Jenin a bay of the plain sweeps eastward, hugging the foot of Mt. Gilboa. An offshoot passes down to the Jordan valley between Gilboa and Little Hermon; and another cuts off the latter hill from Tabor. The average elevation of the plain is 200 ft. above the level of the Mediterranean. The Vale of Jezreel between Zerin and Beisan, a distance of about 12 miles, descends nearly 600 ft., and then sinks suddenly to the level of the Jordan valley. The chief springs supplying water for the plain are those at Jenin and at Megiddo. The former are the most copious, and are used to create a
"paradise" on the edge of the plain. Those at Megiddo drive mills and serve for irrigation, besides forming extensive marshes. The springs near Zerin, three in number, Ain Jalud, possibly identical with the well of Harod, being the most copious, send their waters down the vale to the Jordan. The streams from the surrounding heights are gathered in the bed of the Kishon, a great trench which zigzags through the plain, carrying the water through the gorge at Carmel to the sea. For the most of its course this sluggish stream is too low to be available for irrigation. The deep, rich soil, however, retains the moisture from the winter rains until far on in the year, the surface only, where uncovered by crops, being baked to brick in the sun. When winter sets in it quickly absorbs the rain, great breadths being turned to soft mud. This probably happened in the battle with Sisera: the northern cavalry, floundering in the morass, would be an easy prey to the active, lightly armed
foot-soldiers. The fertility of the plain is extraordinary: hardly anywhere can the toil of the husbandman find a greater reward. The present writer has ridden through crops of grain there, when from his seat on the saddle he could no more than see over the tops of the stalks. Trees do not flourish in the plain itself, but on its borders, eg. at Jenin, the palm, the olive and other fruit trees prosper. The oak covers the slopes of the hills North of Carmel.