Skimiles
From length of runs to Skimiles  the concept of rating the size
Advertisers love simple messages. The length of runs is almost perfect: a single, undisputedly meaningful number in a unit, which everyone uses continuously. The Skimiles, on the other hand, include ten values, some in dimensions that are more difficult to comprehend. Sounds complicated, so here you will find an overview and explanation of the potential criteria for measuring the size of a ski area. There are also ten disciplines in track and field. In the decathlon, the single performances are evaluated with points and the sum of the points decides who may call himself the greatest of all athletes. Those who can only run fast will lose at the end.
In order to determine which disciplines are particularly important for the size of a ski area, we did the obvious thing: asking skiers. The participants assessed the importance of the different factors regarding the perceived size of a ski area, distributing a total of 100 points (participate in the survey).
They could assign them completely to one criterion or distribute them arbitrarily to different criteria. The most important criterion is the length of the runs (including ski routes) with 33.2 percent, followed by the skiable area with 14.1 percent, the vertical drop, the number of peaks and mountain flanks with 12.5 or 11.7 percent, the boundary area with 8.5 percent, the longest run with 7.7 percent, the extent with 7.4 percent and the length of the catwalks with 5 percent.
Before being able to determine the result of this decathlon with these values, the dimensions must be reduced to a common denominator, just like 70 metres in javelin throw and 2.00 metres in high jump. As with the decathlon scoring table, this can be achieved using the world record performances. This is for example 455 kilometres for the length of the runs (without catwalks) and 116 square kilometres for the boundary area. In the decathlon, a maximum of 1,200 points can be achieved per discipline, for determining the size of the ski area 600 points are set (why is explained below). The following table shows the result for the Skicircus Saalbach Hinterglemm Leogang with Fieberbrunn.
Criterion 
Value 
World record 
Max. points for value… 
Saalbach reaches... 
Weight 
Points 

1 
Pistes & Parks 
213 km 
455 km 
400 km 
58.5% 
33.2% 
117 
2 
Ski routes 
21 km 

3 
Catwalks 
36 km 
68 km 
60 km 
60.0% 
5.0% 
18 
4 
Skiable area 
1.010 ha 
1.832 ha 
1.800 ha 
56.1% 
14.1% 
48 
5 
Boundary area 
55,8 km² 
116 km² 
100 km² 
55.8% 
8.5% 
29 
6 
Extent 
18,8 km 
28,4 km 
25 km 
75.2% 
7.4% 
33 
7 
Vertical drop 
1.225 m 
2.435 m 
2.200 m 
55.7% 
12.5% 
42 
8 
Longest run 
8,3 km 
17,0 km 
15,0 km 
55.3% 
7.7% 
26 
9 
Peaks 
15 
30 
75 
54.7% 
11.7% 
38 
10 
Mountain sides 
26 
51 

Size of the ski area 
58.2% 
100.0% 
349 
The largest ski area in the world, the french Trois Vallées, scores 609 points according to this scheme. This corresponds approximately with the length of 600 kilometres of runs that the threevalley ski area currently claims. The calculated score is therefore close to the familiar value of the length of runs. This makes sense, because it makes the calculated value more tangible. Calibrating with 600 points ensures that the results remain in familiar spheres. In order for this to apply to terminology as well, however, it should be left to the decathletes to measure themselves in points. Instead, the result of the size calculation is called Skimiles. After all, miles already exist in various forms: as english, geographical, or nautical miles.
In order to calculate the Skimiles, the ten relevant values for a particular ski area must be recorded. This data acquisition is carried out regularly by Montenius Consult as a basis for the annual report "The list of the worldʼs 100 largest ski areas". This also includes the digitalisation of runs in all major ski resorts around the world to determine the length of the runs. Therefore, the required data is already fully available  with one exception: the skiable area. This data is still being collected. Due to the complexity of the issue, this data acquisition involves a great amount of effort. A more detailed explanation can be found here. For numerous ski resorts, however, the value of the skiable area is already available and the Skimiles could be determined exactly.
While there are hardly any changes in the rankings for some ski areas, others are climbing in the Skimiles ranking. For example, the ZillertalArena almost exactly achieves the rank it would have achieved with the 166 kilometres of pistes it once reported. Thanks to its large boundary area and vertical drop, Sölden reaches the level it occupies with the currently communicated kilometres of pistes (which, however, are calculated on the basis of the area and do not have much in common with the actual length, as does Kronplatz which scores with a large skiable area). Engelberg, which offers a very large vertical drop, also jumps in the Skimiles ranking to the position it would have taken with its incorrectly communicated 82 kilometres of pistes. Vail does well thanks to its vast expanse, while Kitzbühel loses some ranks due to its numerous catwalks.
Ski area  Length of runs communicated (current or maximum in the past)  Rank worldwide km communicated 
Length of runs measured  Rank worldwide km measured 
Skimiles  Rank worldwide Skimiles 

Les Trois Vallées  600 km  1.  543 km  1.  609  1. 
ZillertalArena  132 km (166 km)  48. (25.)  129 km  48.  246  28. 
Kitzbühel (main area)  193 km  17.  193 km  17.  270  19. 
HochzillertalHochfügen  85 km (181 km)  91. (20.)  85 km  91.  180  60. 
Sölden  143 km  36.  100 km  68.  215  40. 
Kronplatz  116 km  55.  80 km  97.  171  68. 
Monterosaski  180 km  21.  80 km  100.  204  46. 
Espace San Bernardo  152 km  35.  152 km  35.  249  26. 
GarmischClassic  40 km  263.  40 km  263.  121  150. 
CorvatschFurtschellas  120 km  51.  43 km  241.  128  141. 
Engelberg  82 km  94.  38 km  293.  159  85. 
Vail  234 km  14.  234 km  14.  320  12. 
Conclusion: The Skimiles provide plausible results regarding the perceived ski area size. Of course, there are also specialists among skiers as well as among track and field athletes. In this case, the weighting of the individual size criteria is different from the average of our survey.