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The Frio River is visible as it meanders south and southeast and intersects with Interstate Highway 35. Approximately 12 miles (19 kilometers) north of the highway-river junction is Pearsall, southeast of which is the Pearsall oil field (barely discernible). The smaller town of Dilley lies approximately 5 miles (8 kilometers) south on Interstate Highway 35. Circular field patterns indicate that irrigation is required to provide sufficient moisture for crop production in this part of south-central Texas.