The Las Cienegas National Conservation Area is a National Conservation Area of Arizona, located in the transitional zone between the Sonoran Desert and the Chihuahuan Desert.

[1] Facing housing and commercial development, more than 45,000 acres (180 km2) of rolling grasslands and woodlands in Arizona’s Pima and Santa Cruz counties was protected as a National Conservation Area.

The region’s rolling grasslands, oak-studded hills that connect several "sky island" mountain ranges, and lush riparian corridors attract both people and wildlife.

Ciénega Creek, with its perennial flow and riparian corridor, supports a diverse plant and animal community.

The BLM has formed a partnership with the nonprofit Empire Ranch Foundation, which is dedicated to preserving the historic buildings and surrounding landscapes.