How Many Calories Does Trail Running Burn — Trail vs Road Compared

If you’re aiming for a healthier lifestyle, understanding calories is key. Simply put, calories fuel our bodies—they come from the food and drinks we consume and are burned through daily activities and exercise. The balance between calories in vs. calories out plays a crucial role in weight management. Eat more than you burn? You gain weight. Burn more than you eat? You lose weight. But it’s not just about quantity—the quality of your calories also impacts overall health and energy levels. So how many calories does running, and trail running more specifically, burn? We take a look in more detail.

How Many Calories Does Trail Running Burn vs Road Running?

Trail running consistently burns more calories than road running at the same pace. The uneven terrain, elevation gain and technical surfaces mean your stabilising muscles work significantly harder than on a flat road. The generally accepted figure is 10 to 15% more calories burned on trail versus road at the same effort level. Here is how that breaks down by body weight:

These figures are based on moderate effort running at around 10 to 11 minutes per mile on road and equivalent effort on trail. Add significant elevation gain and technical terrain, and the trail figure increases further. On a hilly fell or mountain run the calorie burn can be 20 to 30% higher than the road equivalent.

As a high-intensity workout, trail running is an excellent way to torch calories, build endurance, and stay in shape. Whether you’re hitting rugged mountain paths or local woodland trails, running outdoors challenges your body and helps keep your metabolism revved up. But to maximise results, it’s essential to balance calorie intake and nutrition, ensuring your body gets the fuel it needs to perform and recover.

Ready to learn how many calories you burn on the trails? Let’s break it down!

Calories and running

Hands up if you run for cake, or to just indulge in the odd treat. I have to be honest, while I run because I love it, the treats it allows me to have are one of my motivations. But beyond that, there are so many reasons to run other than just the amount of calories it burns. It is important not to get hung up on obsessively counting calories but rather to understand how to fuel your body adequately.

In this article, we will take a look at the answers to the following questions while stressing that it is not all about the calories:

• How many calories does running burn?
• Does running faster burn more?
• How can you calculate how many calories you are burning?
• Does running help you lose weight?
• How do you calculate your BMR?
• Does trail running burn more than road running?

How many calories does running burn?

Let’s start with how much energy running in general burns. On average, each mile burns 80-140 calories. I tend to work it out as 100 calories per mile.

Many factors can influence the number of calories you burn while running, including:

• Bodyweight: The more you weigh, the more calories you burn during exercise.
• Gender: Typically, men burn more calories than women when performing the same exercise.
• Age: As you age, your metabolism slows down, and you burn fewer calories during exercise.
• Intensity: The higher the intensity of your running, the more calories you will burn.
• Speed: Running faster burns more calories than jogging at a slower pace.
• Effort: Running up hills or against the wind requires more effort and burns more calories.
• Terrain: Running on hilly or rugged terrain burns more calories than running on flat terrain.

It’s essential to consider these factors to have a more accurate estimation of your calorie expenditure during trail running, so you can adjust your workout regimen accordingly to achieve your fitness and weight loss goals more efficiently.

Does running help you lose weight?

There are many scientific studies on whether running will help you lose weight. You can do the math though, Unless there are underlying health reasons that you don’t lose weight, generally if you are exercising regularly, and not overeating, you should lose weight. The trick is not to think that if you run 20 miles and Strava says you have burned 2000 calories, don’t put them all back in again. There are so many factors to consider that will vary how many calories you do burn including:

• How much you weigh
• Your metabolism – different metabolic speeds will vary the amount of calories you burn
• How fast you run – time on feet might make a huge difference – a 12-minute mile will burn more than a 7-minute mile but running faster burns calories quicker
• How far you run
• When and what you eat

3,500 calories = 1 pound of fat! Remember this. Consuming your recommended calorie allowance daily and running 35 miles per week on average, should mean you lose a pound a week. Remember, though, that muscle is heavier than fat. If you are new to exercise or introducing something new into your training, you may build muscle which may be heavier. Also, don’t expect overnight miracles – it takes a while for your body to adapt, and your efforts of a few weeks may not be seen for a further couple of weeks.

How many calories does your run burn?

Bear in mind that all of this is based on the average person burning between 80-140 calories per mile. I have always calculated it as 100 calories per mile personally, based on my height, weight etc. So, how many calories does running burn when calculated over the average run distance?

• 1 mile is 80-140 calories
• 5 miles – 400-700 calories
• 10 miles – 800-1400 calories
• 20 miles – 1,600 – 2,800 calories
• Ultramarathon distance – 50 miles – 4000-7000 calories

You may also find that when you are fairly new to the sport, running 25-30 miles a week burns more than when your body gets used to this – your metabolism adapts to your exercise habits so while you may lose weight initially, this may not always be the case. Remember, you don’t have to consume all the calories you eat – just saying.

Running alone may not be enough as part of a weight loss programme. You need to evaluate your nutrition and your lifestyle and if there are health reasons that may have an implication on losing weight. In addition to running coaches, many people use weight loss coaches online to help them achieve their goals. Everyone is different and is about finding what works for you in a healthy and sustainable way.

Calculating your BMR

There are many ways to calculate your basal metabolic rate (BMR). Here are two of the most common methods:

The Harris-Benedict Equation

The Harris-Benedict equation is a formula that estimates your BMR based on your age, sex, weight, and height. The formula is as follows:

Men: BMR = 66 + (6.23 x weight in pounds) + (12.7 x height in inches) – (6.8 x age in years)
Women: BMR = 655 + (4.35 x weight in pounds) + (4.7 x height in inches) – (4.7 x age in years)

For example, a 30-year-old woman who weighs 150 pounds and is 5 feet 5 inches tall would have a BMR of about 1430 calories per day.

The Mifflin-St Jeor Equation

The Mifflin-St Jeor equation is a more accurate way to calculate your BMR than the Harris-Benedict equation. It takes into account your body fat percentage as well as your age, sex, weight, and height. The formula is as follows:

Men: BMR = 10 * weight in kilograms + 6.25 * height in centimeters – 5 * age in years + 5
Women: BMR = 10 * weight in kilograms + 6.25 * height in centimeters – 5 * age in years – 161

For example, a 30-year-old woman who weighs 68 kilograms (150 pounds) and is 165 centimetres (65 inches) tall would have a BMR of about 1360 calories per day.

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Does trail running burn more calories than road running?

The good news is that trail running almost always burns more calories than road running. This is due to the undulating terrain and elevation. Muddy trails, rocky paths, uneven paths… You are using different muscles and almost certainly working harder. There is a school of thought that 10-11 miles of trail running is equivalent to a road half. Time on feet is greater on the trails. It takes longer to cover the same distance on the trails than it does on the roads. The longer you are out there, the more calories you are burning.

I tested this theory with some recent runs. 18 miles on a road run, which took 2 hours and 42 minutes, burned (according to Garmin) 1720 calories. 18 miles off-road, which took 3 hours and 2 minutes, burned 1843 calories. So the difference in this instance was approximately a mile’s worth of calories. Now, once again, we do say this with caution, as this is probably not scientifically exact and is just a rough guide based on my own personal metrics.

The science of trail running and calorie burn

It’s no secret that running can burn a significant number of calories. However, when it comes to trail running, the number of calories burned can vary due to the different set of challenges it presents in comparison to regular road running.

To better understand the science behind trail running and calorie burn, it’s important to consider the factors unique to this form of running. Running on uneven terrain and navigating through natural obstacles such as rocks and tree roots requires greater effort, causing your body to burn more calories than it would during a flat road run.

The impact of terrain

The type of terrain you run on can create a considerable difference in the number of calories that you burn. While both trail running and road running can provide an effective workout, research indicates that trail running generally burns more calories than road running.

The table above clearly shows that trail running burns more calories per hour on average. This difference is because running on an uneven surface naturally activates more muscles in your body, creating a higher energy expenditure and, thus, burning more calories during your workout.

The role of elevation in calorie burn during trail running

Elevation plays a significant role in calorie burn during trail running. Running uphill requires more effort, which means your muscles work harder and burn more calories. Running downhill also burns calories, but not as much as uphill.

According to a study by the American Council on Exercise, running uphill can burn up to 10% more calories compared to running on flat terrain. This is because of the increased intensity that activates more muscles and requires more oxygen.

Trail running with varying elevations also offers additional benefits for your fitness. It strengthens your leg muscles and improves endurance, making it easier to run longer distances. It also enhances cardiovascular health, reducing the risk of heart disease and stroke.

Ensuring you fuel before a run

If you are training for an ultra or undertaking a long training run, it becomes about more than how many calories you burn and how much you can eat after. You need to consider your pre-run fuelling and post-run fuelling. If you are going to burn in the region of 2000-5000 calories, you need to make sure you are not running fasted, and that you are taking on enough to allow you to run this distance safely without feeling faint, hitting a wall or running into trouble.

Fuelling beforehand with a good breakfast of something like porridge and a banana and taking snacks or gels with you, is crucial to ensuring that you are going to have enough energy to complete your run safely.

When you can’t run

The trouble is, sometimes we can’t run, and then we have to watch what we eat. This is especially true when tapering, recovering after an ultra marathon or during a period of injury. Don’t just carry on regardless, though, worrying about gaining weight – you have to do what your body needs you to do. Just be mindful of what you are consuming and don’t fret – a couple of weeks resting is not going to make you gain half a stone. It’s easy to become too obsessed with counting the calories and watching what you eat or trying to grind out extra miles when you shouldn’t have to justify that heavy night you had. There are other options if you can’t run due to injury – you can try cycling. 20 miles of cycling will burn the equivalent of 8-10 miles of running and is far less impactful on the legs.

How much cake can I eat?

This time we are actually referring to how much cake you can eat.

If you are choosing a cake in a cafe, or eating homemade cake, you are hardly likely to be able to determine the calories in it. You can only really tell the calorie content if you have the original packet. Do not fear – we have taken care of it with this! Want to know how many calories are in your favourite cake – check out this page:

A Quick Note on Nutrition & Balance

The information in this article is based on our own experiences and should not be taken as medical advice. While we love cake (who doesn’t?), we also believe in balance and moderation. If you’re pushing your body through intense exercise like trail running, a nutrient-rich diet is essential. Proper fuel helps optimise performance, aids muscle recovery, and keeps you feeling strong.

That said, there’s no need for guilt when enjoying the occasional treat. A well-rounded approach includes plenty of fruits and vegetables, strategic carb-loading when needed, and replenishing lost nutrients at the right time. Ending every run with cake might sound tempting, but if you’re aiming to become a stronger, more efficient runner, focusing on the right nutrition matters.

Most importantly, don’t get caught up in calorie counting or obsessing over how much you’re burning. Instead, listen to your body, fuel it properly, and give it what it needs to perform at its best.