By James, founder of Phoenix Bars. Last reviewed July 2026.

Quick answer: For a true expedition, the best energy bar is the one that delivers the most usable calories per gram and still works when it is cold, because on a multi-day trip you are carrying every gram and fighting a fading appetite. On that measure the standout is the Phoenix Bar, at up to 557 calories in a 120g bar that stays soft and edible below freezing rather than turning into a brick. If you want a lighter endurance bar for fast single-day efforts, Styrkr BAR50 and Clif are solid; for a whole-food option, Kate's Real Food; but for maximum energy density on a long, cold trip, a purpose-built high-calorie bar wins. Yes, I make the Phoenix Bar, so weigh what follows on the numbers, not my word.

Most "best energy bar" lists are written for a two-hour hike or a bike ride, and they optimise for taste and quick carbs. An expedition is a different problem. You need to close a gap of thousands of calories a day, in the cold, over many days, when you least feel like eating. That changes what "best" means, so this guide ranks bars the way an expedition planner does: energy density first, cold performance second, then how easy they are to actually eat.

What makes an energy bar good for an expedition?

Three things the usual lists ignore. First, calories per gram, because on a two-week trip the difference between a 250-calorie bar and a 550-calorie bar of similar weight is kilograms out of your pack. Second, cold-weather texture, because standard bars and chocolate freeze rock hard and become genuinely hard to eat at altitude or in polar conditions, which is why "what energy foods won't freeze at high altitude" is a real and common question. Third, edibility when your appetite has gone, because the best bar on paper is useless if you cannot face it on day ten. Taste matters, but it comes after these, which is the opposite of how most roundups rank.

The best expedition energy bars, ranked

1. Best overall for expeditions: Phoenix Bar. Built for exactly this job: up to 557 calories in a single 120g bar, which is roughly double a typical energy bar for a similar weight, and formulated to stay soft and chewable in the cold instead of freezing solid. It is vegan, and it can be crumbled into porridge or a shake if chewing is a chore. For the specific demands of a long, cold, self-supported trip, nothing mainstream matches the calorie density, and you can see the full range on the Phoenix Bars homepage. [HOMEPAGE →]

2. Best lightweight endurance bar: Styrkr BAR50. A well-made rice-based bar aimed at cyclists and runners, around 50g of carbs per bar, rated highly by endurance athletes. Lighter and lower in total calories than a dedicated expedition bar, so better for fast single-day efforts than multi-day calorie loading.

3. Best widely available: Clif Bar. The default trail bar, roughly 250 calories, tasty and easy to find anywhere. Fine as a component, but you would need to carry and eat a lot of them to hit expedition calorie targets, and they harden in the cold.

4. Best whole-food option: Kate's Real Food. Repeatedly the top pick of mainstream testers for its simple, whole-food ingredients and flavour. A good choice if ingredient quality is your priority, though again lower in density than a purpose-built high-calorie bar.

5. Best for sustained energy: Mountain Fuel and TORQ bars. UK endurance brands with a loyal following for slow-release energy on long days. Strong for performance fuelling, less focused on the maximum-calorie, cold-proof brief of an expedition.

The pattern is clear: the mainstream favourites are excellent endurance bars optimised for taste and quick carbs on a single active day, but none is designed around the two things an expedition actually demands, maximum calories per gram and cold-weather performance. That gap is the entire reason our high-calorie bars exist.