Ski touring time calculator: Munter method and vertical rate
The Munter method: units equal distance in kilometres plus elevation gain in metres divided by 100, and hours equal units divided by a rate. The rates are 4 skinning uphill, 6 on flat or rolling terrain, 10 for the descent and 2 when breaking trail. A 6 km tour with 800 m of gain is 14 units, so about 3 hours 30 on a set track and 7 hours breaking trail.
A tour that runs long is how a manageable day becomes an emergency, and the arithmetic that prevents it takes about fifteen seconds. This calculator uses the Munter method, which is the standard taught in avalanche courses, and it includes the correction that most trip plans leave out: breaking trail in deep snow halves your uphill rate, which turns a five hour day into a nine hour one.
Touring time calculator
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One way, in kilometres.
In metres. Total for the day, not net.
Ten minutes each is a realistic party figure.
The Munter method is a published planning technique, not a measurement we took. It estimates how long a route takes. It says nothing whatsoever about whether the route is safe today.
The Munter rates
| Travel | Rate | What it assumes |
|---|---|---|
| Skinning uphill | 4 | A fit party on an existing track. |
| Flat or rolling | 6 | Approach roads, valley floors, traverses. |
| Skiing down | 10 | The descent, at a touring pace with regrouping. |
| Breaking trail | 2 | Deep unconsolidated snow, no track. Half the uphill rate, and it is not a pessimistic figure. |
The method is deliberately crude and that is its strength. One formula, four numbers, and it can be done in your head at a map before you leave the house or on a ridge when the plan changes. Units equal distance in kilometres plus gain in metres over one hundred; hours equal units over rate. Everything else is judgement.
Worked examples
| Tour | Distance | Gain | Set track | Breaking trail |
|---|---|---|---|---|
| Short lift-accessed lap | 3 km | 400 m (1,312 ft) | 1 hr 45 min | 3 hr 30 min |
| Standard half day tour | 6 km | 800 m (2,625 ft) | 3 hr 30 min | 7 hr |
| Full day tour | 12 km | 1200 m (3,937 ft) | 6 hr | 12 hr |
| Big day, two laps | 18 km | 1800 m (5,906 ft) | 9 hr | 18 hr |
Look at the last two columns on the full day row. The same route is a comfortable outing on a set track and a genuinely committing day if you are the first party in after a storm. Nothing about the terrain changed. The plan has to.
Vertical feet per hour, which is how most people already think
| Party and conditions | Vertical feet per hour |
|---|---|
| First tour of the season | 700 |
| Average fit party, set track | 1,000 |
| Strong party, set track | 1,400 |
| Breaking trail, deep snow | 500 |
These figures include stopping, regrouping, layer changes and the transitions that a pure climbing rate ignores, which is why they look slower than the number you would get from a fitness test. A party is as fast as its slowest member on the day, and everybody has a slow day eventually.
Turnaround time is the part that actually saves people
Decide before you leave the car what time you will turn around regardless of where you are, and write it down. The decision made in the car park by a rested person with no summit in view is far better than the one made three hours later by a tired person who can see the top. Every guide and every avalanche course teaches this, and it is ignored constantly because the summit is right there.
A turnaround time is not only about darkness. The snowpack changes through the day: solar warming on an east or south aspect can take a slope from supportable to dangerous in an hour, and a spring tour that was safe at seven in the morning is a wet-slide problem by eleven. Time of day is a hazard input, not just a logistics one.
What to add to the arithmetic
Transitions cost five to fifteen minutes each for a party, and a party of four is slower than a party of two by more than you would expect, because everybody waits for everybody. Route finding in unfamiliar terrain adds time that is difficult to predict. A skin that stops sticking, a boot problem, or a binding that ices up will each cost a chunk of the day, which is why a repair kit is a planning item rather than an optional extra.
Add at least 25 percent to any estimate for a route you have not skied before. If the result does not fit in daylight with that contingency, the answer is a different objective rather than an earlier start, because a dawn start on a route you do not know is its own set of problems.
Related
How to plan a ski tour covers the full sequence: forecast, map, timing, turnaround, and the plan you leave with somebody who will notice if you do not come back. The touring pace chart is the printable version of these tables, and the slope angle reference covers the terrain side of the same trip plan.
Frequently asked questions
What is the Munter method?
A standard backcountry time estimate taught in avalanche courses. Add the distance in kilometres to the elevation gain in metres divided by 100, which gives a number of units, then divide those units by a rate. The published rates are 4 for skinning uphill, 6 for flat or rolling terrain, 10 for the ski descent, and 2 for breaking trail in deep snow.
How long does it take to skin 1,000 vertical feet?
Roughly an hour for an average fit party on an existing skin track, including a transition. A strong party moves closer to 1,400 vertical feet an hour, a party on their first tour of the season closer to 700, and a party breaking trail in deep unconsolidated snow closer to 500. Those figures include the stopping, regrouping and layer changes that a pure climbing rate ignores.
Why do parties finish tours in the dark?
Almost always because the plan used a set-track rate on a day with fresh snow. Breaking trail halves the uphill rate, which turns a five hour tour into a nine hour one, and that single correction is the most common omission in a trip plan. The second most common cause is not setting a turnaround time, or setting one and then ignoring it.
Does the Munter method account for the descent?
Yes, at a rate of 10, which reflects a touring descent with regrouping rather than a lift-served run. In practice the descent is a small fraction of the day and the climb dominates, which is why most plans focus on the uphill figure. What the method does not account for is transitions, and each one costs a party five to fifteen minutes.
What should I add for transitions and stops?
Budget five to fifteen minutes per transition depending on how organised the party is, and add a contingency of at least 25 percent to any estimate for a route you have not skied before. Route finding in unfamiliar terrain, a party member with a boot problem, or a skin that stops sticking all cost more time than the arithmetic suggests.
Is a time estimate a safety tool?
It is a planning input, not a judgement about the terrain. It tells you whether the day fits in daylight, which matters because being benighted turns a manageable situation into an emergency. It tells you nothing about whether the slopes on the route are safe today. That comes from the regional avalanche forecast, from formal training, and from the party in the terrain.
How we choose: we compare published manufacturer specifications, published certification standards and verified owner reviews across retailers. We do not test equipment in person, and every figure quoted here is the manufacturer's published number unless we say otherwise. This is researched buying guidance and not professional instruction: binding release values are set by a certified technician on a calibrated jig, and avalanche terrain requires formal training and a current regional forecast that no article can replace.
