2018 Map of Big Maria Mountains NE

About this map

The Colorado River defines the border between Arizona and California in this arid landscape, winding past Barrie Island and Hall Island through the floodplain. On the eastern side, the Parker Valley shows a structured network of agricultural and access roads like Peterson Rd and Cottonwood Way, protected by a prominent Levee system that follows the river's curve. The terrain shifts dramatically to the west, where the rugged peaks of the Riverside Mountains and landmarks such as Quién Sabe Point rise above the alluvial fans. Historically significant routes, including the Old Blythe-Vidal Rd, traverse these desert washes. Drainage patterns are dominated by the broad Big Wash and Slaughter Tree Wash, illustrating the powerful seasonal hydrology of the Colorado River basin before it enters the valley floor.