| 2x4 Roads |
| | Ajo Mountain Drive | | 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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| | Puerto Blanco Drive | | 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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