For authentic Mexican fare, head to Dos Locos for some of the most delicious entrees and budget-friendly dining in Keystone. Enjoy scrumptious burritos, tacos, enchiladas and warm chips with zesty salsa. Appetizers include chicken quesadillas and my favorite, the nachos grande pilled high with toppings. If you save enough room for dessert, try the deep-fried ice cream or the dessert empanadas.