Calorie Density And Food Energy Per Weight

On a thru hike, all food energy must be carried or obtained in town stops. Since pack space and carrying capacity are limited, hikers often pay close attention to calorie density, which is the amount of energy per gram or ounce of food. Selecting higher-density items lets hikers carry more energy for the same pack weight.

Foods that contain significant amounts of fats and oils, along with low moisture content, tend to have higher calorie density. Examples include various nuts, seeds, certain trail mixes, and some prepared snack items. Dehydrated or freeze-dried meals can also offer favorable energy-to-weight ratios once water is added at camp.

However, calorie density is only one factor. Hikers also consider how foods sit with their digestive systems during sustained exertion, whether they provide a mix of macronutrients, and whether the flavor remains appealing over many days. Highly dense foods that become unappealing or difficult to digest do not serve hikers well.

Packaging and preparation influence efficiency. Foods with minimal packaging reduce trash volume and weight, though some hikers accept extra packaging for convenience or protection. Items that require significant cooking time may use more fuel, which itself must be carried.

Balancing calorie density with variety and enjoyment helps hikers maintain sufficient intake across a multi-month journey, while managing pack weight in a realistic way.