Paul, your shoes are too small. First, go to a quality shoe store and have your feet measured using a brannoc device. You'll want to do this from time to time, because your feet continue to grow throughout your lifetime (along with your ears and nose; not only that, but a veritable forest of hair will sprout out of your ears and nose, but that's normal. If hair sprouts between your toes, then you've got problems). Now, because each shoe manufacturer uses different lasts, shoe sizes are not consistent. That is to say that the industry is not standardized, which can make fitting a shoe a challange.
Here's what I do: after having my foot measured I select a shoe that is a half size larger. Then I loosen the laces, and while standing, insert my foot wearing hiking socks and push it forward into the toe box until I just contact the end. Finally, I bend my leg slightly at the ankle and insert my index finger into the space created behind my heel. If the shoe is the proper size my finger slips in quite easily...that's the equivalent of about a 3/4" space. If I have to jam my finger in then the shoe is just too small.
You'll want all that space because your feet will swell as the day progresses - especially when carrying a 30lb pack. Also this allows your foot to slide forward somewhat on the downhills without banging into the toe of the shoe. So the point is don't go by the numbers stamped on the box; put on the shoe and determine how much toe box space it affords you. Happy trails!