Vast groves of cottonwood and mesquite exist.

In the alluvial division, the last stretch of the river, from the Gila down, cotton and sugar cane would probably grow.

This is the only division where the water of the river can be extensively diverted.

At the mouth of the Gila an old emigrant road to California crossed, and another here in this Green River Valley.
A third route of travel was by way of Gunnison's Crossing; and a fourth, though this was seldom traversed, was by the Crossing of the Fathers, some thirty-five miles above the present Lee's Ferry.

In Green River Valley, Bonneville built his Fort Nonsense, and the region was for many years the best known of any place beyond the mountains.