The second day we climbed and climbed and climbed some more. We just did about 30 miles but it was steep, narrow and the hardest bike climbing I have done. I have a helmet mirror which helps figure out when I have to dive off the road. I actual slipped once on the gravel trying to move over for the traffic and slipped off my bike but I caught myself. My pannier came off. And this was all in front of a bus which was coming up the steep incline. But the driver was a very good driver and was watching out. He was a just barely moving when this happened. (I don't like these Mexican bus drivers -- they cut too close -- but for this one I'll make an exception. Thanks for your good driving!)