La Casa del Caballo the best steaks I've ever eaten. I must confess the service is great and Americans love the spot. Downre nice as well, nice town and splendid weather in summer due to the altitude and dry weather.
Also dont forget to visit Cuatro Cienegas its a small town located in the middle of the desert where you will find beautiful water springs filled with crystal clear waters.
PLEASE DO NOT USE SUN TAN LOTIONS NOR SUN BLOCKERS it POLLUTES the ECOSYSTEM.

Empanadas del Merendero (bread filled with carmel and pecan nuts -irresistible-)

Accesing to Saltillo (Iata SLW) is fairly easy from MexDF, Monterrey (MTY) Houston (HOU) there is one flight connecting HOU everyday, there are 4 flights to MXC and Monterrey is 45 min away which is served by several flights from US, Canada and Europe.

Not much happening in Saltillo, but if you do stop by and crave something to eat look up a restaurant called "Pour Le France", AKA "El Purla". Do not expect French cuisine, the menu is actually typical Mexican food, heck knows where the name came from.