Preheat the oven to 350 degrees. In a medium bowl, mix flour, oats, salt, baking soda, and ground cinnamon. In a separate bowl, cream butter, add sugar, eggs, and vanilla, and combine with the flour mixture. Stir in pumpkin and fold in butterscotch chips.
Shape the dough into 1-2 inch balls, space them about 2 inches apart on a cookie sheet, and flatten slightly. Optionally, sprinkle with brown sugar. Bake for 13-15 minutes until light brown. Let them cool a bit before transferring or enjoying.