Reserva De La Biosfera Mariposa Monarca

We've been, and didn't have a great experience. Mostly on account of the fact that we drove for a VERY long time on some super rough, windy, speed-bump infested roads, and had a hard time locating the reserve entrance. Drive east from Ocampo and you should start to see signs for the reserve, then drive for a whole lot longer, along super bumpy roads. Then after driving up a whole lot of hills and through some tiny villages, you'll see a parking lot and you then walk another 15-20 minutes to the visitor centre. From there, it's another 40 minutes of walking up the mountain to the area where the butterflies are supposed to be (only in October and November, I believe). We did all this and didn't see any. And that was at the time they were supposed to have migrated there by. But perhaps it was just poor timing. If nothing else, the reserve is quite picturesque and it's nice walking amongst the trees.