The U.S. Department of State updates its travel alerts and travel warnings periodically in order to provide travelers with the most recent information. The Mexico travel warning was updated on July 12 to reflect the current situation in Mexico, however there are few changes from the previous iteration which was issued on November 20, 2012.
The U.S. State Department's warning contains several links to a map of Mexico, reinforcing the point that in order to understand Mexico's security situation, travelers should have a grasp on Mexican geography: some parts of the country are considered risky, while many others are safe to visit. It also contains a list of Mexican states and security information for each of them. According to the warning, most of Mexico's popular tourist destinations are deemed safe for visitors, including: Los Cabos, La Paz, Guanajuato, San Miguel de Allende, Guadalajara, Puerto Vallarta, Mexico City, the Riviera Nayarit, Oaxaca, Huatulco, Puerto Escondido, Puebla, Cancun, Cozumel, Playa del Carmen, Riviera Maya, Tulum, and Merida. Many other cities are also safe; check the full text of the warning for details.
As in the previous warning, the State Department continues to caution against nonessential travel to specific areas of Mexico, particularly along the border with the United States. In the state of Guerrero on the Pacific coast, travelers are encouraged to remain within the tourist areas of Acapulco, Ixtapa / Zihuatanejo, and Taxco. Similarly, visitors to Mazatlan, in the state of Sinaloa, are advised to stay within Mazatlan's Zona Dorada and the historic town center, and to defer nonessential travel to the rest of the state.