Grulla National Wildlife Refuge, National wildlife refuge in Roosevelt County, New Mexico

Grulla National Wildlife Refuge is a protected area in New Mexico covering about 3,236 acres of flat terrain dominated by a central salt lake. This lake fills with water after heavy rains and creates essential habitat for migrating waterfowl and cranes passing through the region.

The playa was part of the DZ Ranch in the early 1880s, which is why some locals still call it DZ Lake; maps today label it Salt Lake, and it is also called Arch Lake after the community of Arch about 6 km northwest. The refuge is administered by Muleshoe National Wildlife Refuge in Texas, and in the mid-2000s Eastern New Mexico University cross country teams trained on its trails.

The name Grulla is Spanish for crane, referring to the sandhill cranes that use the playa when it holds water. The lake has also been called Salt Lake, DZ Lake after the early 1880s DZ Ranch, and Arch Lake after the nearby community of Arch.

The refuge lies southwest of the intersection of State Highway 88 and the Texas–New Mexico border, about 25 miles southeast of Portales and just southeast of Arch. There are no facilities beyond a parking lot and trails, and it is administered by Muleshoe National Wildlife Refuge in Texas. The playa is shallow and often dries out, so bring binoculars and check water conditions before a visit.

The saline playa has had several names: USGS maps label it Salt Lake, while people connected to the DZ Ranch, which owned the land in the early 1880s, call it DZ Lake, and locals also know it as Arch Lake after the community about 6 km northwest. The refuge is administered from Muleshoe National Wildlife Refuge in Texas.