Divide dough into two equal pieces, about 28-30-ounce each. Pre-shape each portion to an oval shaped piece of dough by pulling and tucking the sides under. This will make it easier to roll out into a rectangle. Place both pieces on the floured countertop.
Working with one piece of dough at a time, flour the work surface and roll to a rectangular shape, about 10 inches by 18 inches.
Spread half of the filling onto the dough, leaving a one inch border on all four sides. Start with the long side closest to you, and working from left to right begin to roll dough up. You can tug and pull as you go, tightening the roll. This can get messy - if peaches are sliding out, tuck them back in as best as you can. You can also place any extra peaches on top of the rolls. Pinch the edge to the roll, sealing the seam shut.
Cut the roll into 9 equal size peach cinnamon rolls, about 2 inches each. To do this, slide a piece of dental floss or baker's twine underneath the roll. Bring both ends up and cross them over, cutting the roll cleanly.
Place peach cinnamon rolls on a greased baking sheet about 1-2 inches apart. Use a bench scraper to clean off work surface. Roll out, top, and shape the second piece of dough, making an additional 9 peach cinnamon rolls. You should be able to fit all 18 peach rolls on one half-sheet baking sheet.