Central Anza-Borrego: US Gypsum Quarry

US Gypsum Quarry Plant

US Gypsum Quarry

Unprocessed Gypsum, US Gypsum Quarry

Unprocessed gypsum, US Gypsum Quarry

US Gypsum Quarry

Fish Creek Mountains

US Gypsum Quarry

Fish Creek Mountains

Restoration, US Gypsum Quarry

The San Juan Bautista de Anza National Historic Trail crosses the Lower Borrego Valley.