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Two well-graded gravel roads lead through different sections of this large national monument, and many visitors are content to just drive through this unusual landscape. For the best scenery in the park, follow Ajo Mountain Drive, a 21-mile one-way loop that meanders through the rugged foothills of the Ajo Mountains. Along this route, you can get out and hike the Arch Canyon, Estes Canyon, or Bull Pasture trails. Alternatively, if you are short on time, take Puerto Blanco Drive, a 5-mile route leading to the Pinkley Peak picnic area. Guides available at the park's visitor center explain natural features of the landscape along both drives. In the winter, there are guided van tours of Ajo Mountain Drive, as well as guided hikes. Much of the monument is now closed to the public due to safety concerns about the use of this area by illegal immigrants crossing the border from Mexico. Be sure to check with the national monument before planning any hikes.

Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.