Energy Bars
This snack says it in the name. The very purpose of energy bars is to provide the nutrition you need to stay energized. These products combine carbohydrates, protein and energizing vitamins and minerals into one handy snack. However, some taste better than others, so be sure to try one before you buy a large quantity.
Nuts
Nuts are a great source of protein and provide the calories needed to keep your muscles moving all day. They're easy to eat and easy to digest so they're perfect to munch on while walking. Eat them alone or make your own trail mix by combining almonds, peanuts, cashews, dried fruit and chocolate chips.
Jerky
Jerky is another great snack choice to bring along on while hiking or mountain biking. Whether it is beef jerky, turkey jerky or some other variety, it's packed with protein and will give your muscles the strength they need. And most importantly, it's lightweight and compact so it won't weigh you down or get crushed in your bag.
Fruit
Any type of fruit is a great nutritional choice for trail food. Fruit is composed of good carbohydrates that will help keep your energy up. However, some fruits are better than others to eat on the trail. Fresh bananas, peaches and berries are all likely to get squished when packed in a bag, whereas hard fruits such as apples, pears and oranges are resilient enough to survive the trip. Another great option is dried fruit, which has the same nutritional value but is much smaller and more durable.
Crackers and Cheese
For a snack that eats more like a meal than a piece of fruit or handful of nuts, bring along crackers and cheese. Pre-slice some cheese and bring along a box of crackers to have a miniature picnic along the way. The only downside to this trail snack is that it's a little more cumbersome than other choices--it's less compact and the crackers can break. However, it does fit the nutritional requirements by supplying protein and carbohydrates and it tastes delicious. It's also a favorite among kids.