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| Ajo Mountain Drive - 2x4 Roads | | The drive is a 21 mile loop within Organ Pipe Cactus National Monument in southern Arizona. The drive goes through mountainous desert that takes 1-2 hours. It is passable for a passenger car and the surface is maintained dirt or gravel. Trailers are not recommended on these roads. |
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| Organ Pipe Cactus National Monument - Scenic Drives In National Parks | | This monument exhibits an extraordinary collection of plants of the Sonoran Desert, including the organ pipe cactus, a large cactus rarely found in the United States. |
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| Puerto Blanco Drive - 2x4 Roads | | This drive circles the colorful Puerto Blanco Mountains and passes through a startling variety of scenery. The drive is 53 miles within Organ Pipe Cactus National Monument in southern Arizona. The drive goes through mountainous desert that takes 2-3 hours. It is passable for a passenger car and the surface is maintained dirt or gravel. Trailers are not recommended on these roads. |
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