Preheat oven to 375 degrees F. Lightly spray a cookie sheet with cooking spray.
Mix flour, brown sugar, butter, cinnamon, rolled oats and salt in a bowl using a pastry cutter until evenly crumbled.
Open Cresent Roll package and seperate into triangles, flatteing out a bit. Taking a scoop of the crisp, coat each triangle, pressing it down into the crescent.
Place 1-2 peach slices on the larger end of the triangle.
Roll up each crescent roll, starting on wide edge, tucking in edges over the peaches and then roll down to the point of the crescent, creating a little bundle.
Place on prepared cookie sheet and repeat until all peach crisp rollups are made. Bake in preheated oven for 10-12 minutes, or until dough is cooked through and golden brown. Sprinkle with cinnamon and sugar if desired. Enjoy!