Granola is akin to Granola bars work in this scenario as well, and they can help you better monitor the portions you're consuming as well. Nuts can add a lot of calories as well, but nuts are full of healthy fats that do a lot for your body. A nutty granola combines a good ratio of protein and carbs to get you through a tough climb or what seems like an endless hike because it's got both types of fuel for your body.