Approximate location — plotted from published sources, not a site visit, and not a guarantee of access.
Trigo Mountains Wilderness covers about 30,300 acres of rugged desert north of Yuma and east of the Colorado River corridor. There are no formal trails; old vehicle ways and burro paths provide routes from perimeter roads near Imperial National Wildlife Refuge and Martinez Lake approaches.
Cultural sites and artifacts are protected by federal law (ARPA/NHPA) — stay on established routes, touch and remove nothing, and follow the managing agency's and the affiliated tribe's guidance on access.