I always have at least a light breakfast the morning of a hike - some of you might think it's gross, but I'll have yogurt and/or fruit at home and a sandwich with whole wheat bread or something like that along the way - but that's mainly because of time constraints. If I had the time, I'd probably try for a more traditional breakfast like scrambled eggs and toast or something. Either way, I also usually drink about a pint of water during my drive there.
I find the more important thing to focus on is the day or two before. I usually drink no alcohol the few days before a big hike and the night before, if I get around to it, a good pasta meal like Chicken Parmigiana is good. I try to drink eight glasses of water a day and the day before a hike, I usually drink a little more than that. I find I rarely feel thirsty, let alone, dehydrated on a hike if I'm fully hydrated from the day before. It's just what works for me.
I find the more important thing to focus on is the day or two before. I usually drink no alcohol the few days before a big hike and the night before, if I get around to it, a good pasta meal like Chicken Parmigiana is good. I try to drink eight glasses of water a day and the day before a hike, I usually drink a little more than that. I find I rarely feel thirsty, let alone, dehydrated on a hike if I'm fully hydrated from the day before. It's just what works for me.