Qui ho trovato il risultato dei conteggi dei km dei comprensori fatto da Christoph Schrahe,malato di sci cui si fa riferimento nell'articolo,il link dove ci sono i dati e altri articoli è questo:
http://www.nationalskiclubnews.com/images/2013MayIssue.pdf
The Worldʼs Largest Lift-Connected Ski Resorts
By Length of Trails (in Kilometers)
# SkiArea Country TrailLength
1 kilomter = .62 miles
1. Trois Vallées France 493
2. Paradiski (LesArcs/La Plagne) France 378
3. SellaRonda Italy 309
4. Les Portes du Soleil France/Switzerland 263
5. Matterhorn Ski Paradise Switzerland/Italy 252
6. Whistler/Blackcomb Canada 252
7. Via Lattea Italy/France 251
8. SkiweltWilder Kaiser/Brixental Austria 232
9. Espace Killy (Val d‘Isère/Tignes) France 232
10. Vail USA 222
11. Big Sky-MoonlightBasin USA 215
12. Skicircus Saalbach-Hinterglemm Austria 187
13. Espace Diamant France 178
14. GrandesRousses France 176
15. Tres Valles Chile 175
16. Le Grand Massif France 172
17. WeisseArena Switzerland 166
18. Kitzbühel Austria 164
19. Les 4 Vallées Switzerland 164
20. BeaverCreek USA 163
21. Grandvalira Andorra 157
22. SerreChevalier France 156
23. Alta-Snowbird USA 154
24. Silvretta Skiarena Austria/Switzerland 154
25. TheCanyons USA 143
26. Serfaus-Fiss-Ladis Austria 142
27. Snowmass USA 141
28. Les Sybelles France 141
29. Les 2Alpes France 134
30. Winter Park USA 133
31. Breckenridge USA 133
32. Keystone USA 132
33. VierBerge Skischaukel Austria 131
34. Jungfrauregion Switzerland 130
35. Sun Peaks Canada 128
36. Copper Mountain USA 126
37. Espace SanBernardo Italy/France 126
38. Killington USA 124
39. Skirama Dolomiti Italy 120
40. Mammoth Mountain USA 119
41. Mt.Bachelor USA 119
42. Lech/Zürs Austria 118
43. Grande Domaine France 118
44. Formigal Spain 117
45. Steamboat USA 117
46. Silvretta Montafon Austria 116
47. ZillertalArena Austria 115
48. Telluride USA 115
49. SkiArlberg (St.Anton/Stuben) Austria 113
50. ParkCity MountainResort USA 112