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Alpine Mountain Region: Southern Colorado |
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Carrera Region: Western tip of Texas and Southeastern New Mexico |
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Intermountain Region: All of Utah, Southwest Wyoming |
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Llano Estacado: Amarillo, the Texas and Oklahoma panhandles. |
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Roadrunner Region: Most of New Mexico and Southwestern Colorado |
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Rocky Mountain Region: Northern Colorado, Southeastern Wyoming, and Southwestern tip of Nebaska |
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West Texas Region: Midland, Lubbock and the surrounding area. |