Combine flour, oats, soda, and cinnamon in mixing bowl; set aside. Cream sugars, shortening, and vanilla. Beat in eggs. Gradually add dry ingredients and mix until well blended. Refrigerate dough until chilled or overnight.
Preheat oven to 350 degrees. Line cookie sheets with parchment paper. In small bowl, combine the sugar and pumpkin spice for rolling. Using 1 tablespoon each, shape dough into balls. Roll in sugar mixture and place on cookie sheets about 2" apart. Flatten balls with a fork.
Bake 10 minutes. Remove from oven and cool cookies on cookie sheet for 2 minutes. Remove to wire rack and cool completely. Makes 4 dozen.