Mountain hiking burns about 420–700+ calories per hour, based on weight, incline, pack load, pace, and altitude.
You came here for a clear number. Energy burn on a steep trail hinges on two levers you control—grade and body weight—and a few you don’t, like thin air and ground surface. With those in mind, you can pin down a close estimate and plan food and water with fewer surprises.
Calories Burned While Hiking A Mountain: Quick Method
The simplest way to estimate trail energy use is to plug the movement’s intensity into a standard formula. Exercise scientists rate tasks with “METs” (metabolic equivalents). A value near 6 sits at the border of moderate and vigorous work. Uphill trekking rises into the 7–9 range; steeper grades push you even higher. Use this shortcut:
Step-By-Step Calorie Equation
1) Pick a MET for the terrain: gentle climb 7.0; steeper climb 8.8. 2) Convert body weight to kilograms (pounds ÷ 2.2046). 3) Calories per minute = MET × 3.5 × kg ÷ 200. 4) Multiply by minutes on trail.
These MET levels reflect measured values for climbing grades and loads from the Compendium of Physical Activities and match public health ranges for vigorous work near and above 6 METs. They’re a solid starting point.
Broad Early Estimates (Per Hour)
The table below gives quick hourly numbers for a steady uphill walk without a heavy pack. These reflect 7.0 METs for a moderate grade and 8.8 METs for a steeper pitch.
| Body Weight | Moderate Uphill (6–10%) | Steeper Uphill (11–20%) |
|---|---|---|
| 125 lb (56.7 kg) | ~417 kcal/hour | ~524 kcal/hour |
| 155 lb (70.3 kg) | ~516 kcal/hour | ~647 kcal/hour |
| 185 lb (83.9 kg) | ~608 kcal/hour | ~763 kcal/hour |
| 200 lb (90.7 kg) | ~648 kcal/hour | ~814 kcal/hour |
Numbers climb with steeper grades, extra load, wind, heat, altitude, and rough footing. Numbers drop on descents and smoother tread. If you carry a heavy pack, bump your estimate by 10–30% based on load.
Why Trail Steepness And Load Matter
Walking uphill demands more oxygen each minute than flat walking, so energy use spikes even at a moderate pace. Add a pack and your legs do extra work to lift the added mass against gravity. That combination explains why a hilly route can feel twice as tough as a neighborhood stroll even at the same speed.
What Research Uses For Hiking Intensity
Exercise guides place steady uphill movement in the vigorous camp. Public health pages set vigorous work at 6 METs or higher, and field listings show hill climbing in the 7–9 band, rising with slope and load.
Build Your Own Estimate With METs
Want a number tailored to your route? Use the MET formula and pick a rating that mirrors your plan.
The MET Formula In Practice
Calories per minute = MET × 3.5 × body weight (kg) ÷ 200. One hour is 60 minutes. A 155-lb hiker (70.3 kg) on a moderate climb at 7.0 METs burns about 7.0 × 3.5 × 70.3 ÷ 200 × 60 ≈ 516 kcal. The same person on a steeper grade at 8.8 METs lands near 647 kcal per hour. Swap your own weight and time to get a route-ready estimate.
Picking A MET For The Route
Use 6.0 for rolling trails with mild ups and downs, 7.0 for a steady climb near 6–10% grade, and 8.8 for a steeper pitch in the 11–20% range. Add 0.5–1.5 METs when you shoulder a heavy pack or gain altitude fast. For long summit days with big carries, a 9–10 MET range can fit the effort you feel.
Factors That Swing Your Calorie Burn
Terrain, grade, and load sit at the center, but several other pieces tilt the total. Use these to refine your plan and keep snacks and water on point.
Grade And Total Elevation Gain
More vertical work per mile equals more energy per hour. A route with short ramps and flats will sit lower than a sustained climb, even if the distance matches. If the map shows long red uphill segments, plan on the higher column from the first table.
Pack Weight
Food, layers, water, and safety gear add up. A daypack may nudge the number by a small margin. A loaded overnight pack can raise energy cost sharply.
Altitude And Heat
Thin air and hot days raise strain at a given pace. Expect a higher burn for the same route when the summit sits far above sea level or the sun bakes the trail.
Trail Surface
Loose gravel, sand, roots, and snow sap energy each step. Rock steps demand short bursts. That nudges the hourly number upward even when grade holds steady.
Pace And Breaks
Speed changes sway burn per hour. Short breaks lower the hourly total, while a steady grind keeps the meter running. Use moving time when you apply the formula, or estimate both to set food needs.
Sample Routes And Realistic Ranges
Here are practical ranges for common mountain days. Adjust for load and air density.
Steady Summit Push (No Heavy Pack)
Think of a 6–10% grade with solid footing and moderate wind. Most hikers will sit near 7.0 METs. That puts a 125-lb hiker around 420 kcal per hour, a 155-lb hiker near 520, and a 185-lb hiker close to 610. Faster speeds or long stair-like sections push higher.
Big Grade, Rocky Steps
When the slope tips into the 11–20% range with frequent step-ups, 8.8 METs is a fair pick. That same trio lands near 525, 650, and 760 kcal per hour. Add more if the route hops over boulders, if wind slams the ridge, or if temps soar.
Overnight Carry
A heavy pack adds work on each lift and puts numbers into the 8–9+ MET lane even on moderate grades. Expect a jump of 10–30% over the “no pack” rows above, scaled by how much you’re carrying and how tight the trail turns.
Source Basics
For context, see the CDC page on measuring intensity and the Compendium MET list for hill walking.
How To Plan Fuel And Water From Your Number
Once you have a per-hour estimate, map it to a snack plan. Many hikers aim to replace 30–60 grams of carbohydrate per hour on steady efforts. Pair that with water and sodium that match the day’s heat. The math you just ran gives you a sense of how many snack breaks you need across the climb and how many bottles to pack.
Carrying Smart Calories
Mix quick sugar with slower burn foods: a gel or dried fruit for steep ramps, nuts or a small wrap for sustained sections. Keep items easy to reach so stops stay short. If a long descent follows, keep a little in reserve to stay sharp on the way down.
Hydration Targets
Start the day topped up. Sip early. Warm days call for more fluids and some sodium. Cold days still drain water; dry air at altitude speeds that up. A ridge headache often means you need fluids and a small snack.
Second Reference Table: Trail Variables And MET Ranges
Use this compact table as a route-planning helper. Pick a row and feed the MET into the equation.
| Situation | Typical MET Range | What To Expect |
|---|---|---|
| Rolling Trail, Occasional Ups | 6.0–6.5 | Feels steady; snack every hour. |
| Moderate Grade, No Heavy Pack | 7.0–7.5 | Breathing picks up; steady sweat. |
| Steep Grade, Rock Steps | 8.5–9.0 | Short pauses help; higher burn. |
| Heavy Pack (20–40 lb) | 8.0–9.0 | Moves slower; add 10–30% calories. |
| High Altitude Day | +0.5–1.0 | Same pace feels harder; drink more. |
| Snow Or Loose Sand | +0.5–1.0 | Footing costs energy; plan extra. |
Worked Examples You Can Copy
Example 1: Fast Half-Day Push
You weigh 180 lb (81.6 kg) and plan two hours uphill near 8.8 METs, plus two hours mix of flats and descent near 5.0 METs. Uphill: 8.8 × 3.5 × 81.6 ÷ 200 × 120 ≈ 1516 kcal. Mixed return: 5.0 × 3.5 × 81.6 ÷ 200 × 120 ≈ 857 kcal. Trip total ≈ 2370 kcal. Pack 150–250 grams of carbohydrate across those hours, plus protein at the car for recovery.
Example 2: Moderate Pace With Daypack
You weigh 150 lb (68.0 kg) and carry a small pack. Three hours up and down on a 6–10% grade at 7.0 METs ≈ 7.0 × 3.5 × 68.0 ÷ 200 × 180 ≈ 1501 kcal. If wind picks up or footing gets rough, the effort can edge toward 7.5 METs, adding about 100–150 kcal.
Make Your Number More Precise
Want to tighten the estimate? Track moving time, check total elevation gain, and log food and water. After a few outings, you’ll spot a pattern and can tune your plan around weather and load. Fitness watches that log grade and heart rate can help you match days to MET picks for smoother planning.
Bottom Line For Trail Calorie Planning
Pick a MET that matches the grade, plug in your weight, and multiply by time on the move. Add a bit if the pack is heavy, the slope rises, or air gets thin. With a number in hand, set a simple snack and sip plan. That’s how you turn a vague question into a dialed-in day on the mountain.