It is always good to exchange some Mexican money at the border. Banks offer favorable exchange rates and many require passports to exchange cash. ATM machines are readily available throughout Mexico including in Alamos.
Banorte has a satellite office in Alamos directly across the street from the Pemex station at the entrance to town. An ATM machine can be found in the lobby.
Casa de Cambio/Money Exchange on the Alameda offers favorable rates Monday to Saturday, 9 -5
Use the Xenon Laboratories Universal Currency Converter™ to calculate exchange rates between Mexican Pesos and other international currencies.