Any of your leftover Venison Roast can be stored in the fridge for up to 5 days and added into soups, stews, or warmed up and served over rice, egg noodles or mashed potatoes. If you have a lot leftover, you can freeze it sealed in freezer bags, or any other airtight container, for up to 5 months.  Once you are ready to use it, defrost in the fridge overnight and then reheat slowly in a saucepan with some of the gravy or a touch of water or beef broth.