http://www.bikepacking.net/forum/question-and-answer/copper-canyon/Some think November is the best time to go to las Barrancas del Cobre. A little cold at night, light wind, little rain, no plants in the fields for, what did he call them, Narcotraficantes to worry about.
Tren Chepe is so cool, the Tijuana policia stop robbing people long enough to reminance about it.
https://www.mexicodestinos.com/blog/2012/05/mapa-recorrido-tren-el-chepe-barrancas-del-cobre/You can ride the Baja Divide, catch the ferry at La Paz and roll onto the tren Chepe.
https://www.youtube.com/watch?v=2fE6AvSlgBsyoutube is has a few choices
https://www.youtube.com/watch?v=B4_p7yX_S7o