Adjust oven rack to center position and heat oven to 325 degrees. Mix first 6 ingredients together in large bowl.
Heat maple syrup and honey together with oil in small saucepan, whisking occasionally until warm. Pour mixture over dry ingredients; stir with spatula until mixture is thoroughly coated. Turn mixture onto an 11-by-7-inch jelly roll pan, spreading mixture in an even layer.
Bake, stirring and respreading mixture into an even layer every 5 minutes, until granola is light golden brown, about 15 minutes. Immediately turn granola onto another jelly roll pan to stop cooking process. Stir in raisins, then spread granola evely in pan; set on a wire rack and cool to room temperature. Loosen dried granola with a spatula; store in airtight container.