Mexican Hay Lake, located in Apache County, Arizona, is a private fish and wildlife pond with a primary purpose of supporting local wildlife. Built in 1908, the Earth dam stands at a height of 11 feet and spans a length of 250 feet, with a storage capacity of 821 acre-feet. The lake covers a surface area of 164 acres and is fed by the Joe Baca Draw - TR river or stream.

Managed by the Arizona Department of Water Resources, Mexican Hay Lake is subject to state regulations, inspections, and enforcement to ensure its safety and compliance. With a low hazard potential and a moderate risk assessment rating, the lake serves as a recreational area for South Fork Campground visitors while also supporting irrigation needs in the surrounding area. Despite its age, the dam's condition is not currently rated, but it undergoes inspections every 5 years to ensure its structural integrity.

Enthusiasts of water resources and climate in the region will find Mexican Hay Lake to be a fascinating example of early 20th-century water management and conservation efforts. With its historical significance, diverse wildlife habitat, and critical role in local irrigation, Mexican Hay Lake is a valuable asset to the community and a testament to the importance of sustainable water resource management in the region.