Approximate location — plotted from published sources, not a site visit, and not a guarantee of access.
Lower Colorado River National Wildlife Refuge in the Yuma Desert floodplain with channelized river, backwaters, farmed moist-soil units, and desert ridges. Critical Pacific Flyway stopover—hundreds of bird species including wintering waterfowl, sandhill cranes, and riparian specialists—plus mule deer and desert upland wildlife in extreme low-rainfall country.