An archaeological site reconnaissance was conducted within Picacho State Recreation Area (SRA), a park that borders the Colorado River. No archaeological work had been previously conducted within Picacho SRA. A total of 23 prehistoric and three historic sites were observed and plotted on a map, and will be recorded at a later date. Fifteen prehistoric sites are defined as occupation areas which show remains of aboriginal sites including stone-tool manufacturing areas and trail segments. The remains of the Picacho townsite and mill were in part recorded at this time. Artifacts found within the project area consist almost exclusively of stone cores and flakes; one fragmentary projectile point was observed. The present fieldwork demonstrates that Picacho SRA contains rich prehistoric and historic cultural remains.