The United States Congress designated the Big Maria Mountains Wilderness (map
) in 1994 and it now has a total of 45,384 acres
All of this wilderness is located in California
and is managed by the Bureau of Land Management.
The Big Maria Mountains Wilderness is bordered by
the Rice Valley Wilderness
to the north.
Gently sloping bajadas, or desert slopes, rise to numerous rough and craggy peaks separated by steep canyons in Big Maria Mountains Wilderness. The Big Marias lie just south of a major drainage called Big Wash and just west of the Colorado River and the Arizona border. The northwest boundary follows a power line south, then turns southeast to trace the contours of the base of the mountains. Foxtail cactus and California barrel cactus dot the dry and desolate landscape, and a small herd of deer depend on the waters of the river for survival.
There are no trails, but several unmaintained two-track primitive routes providing foot access into the Wilderness.