Alps: biggest ski resorts

All 1154 ski resorts in the Alps sorted according to size (total slope length).


Biggest ski resort in the Alps (600 km)

The ski resort Les 3 Vallées – Val Thorens/​Les Menuires/​Méribel/​Courchevel is the biggest ski resort in the Alps. The total slope length is 600 km.

Biggest ski resort in the Alps – ski resort Les 3 Vallées – Val Thorens/Les Menuires/Méribel/Courchevel

Biggest ski resorts in the Alps

651-850 out of 1154 ski resorts

Evaluation
200 m (1200 m - 1400 m)
3.5 km 2 km 1 km 0.5 km
  • 3 ski lifts
€ 13,-

Evaluation
255 m (855 m - 1110 m)
3.5 km 3.5 km 0 km 0 km
  • 1 ski lift
SFr. 28,- / approx. € 30,-

Evaluation
174 m (1194 m - 1368 m)
3.3 km 1.7 km 1.6 km 0 km
  • 5 ski lifts
€ 32,-

Evaluation
830 m (790 m - 1620 m)
3.2 km 0 km 0 km 3.2 km
  • 1 ski lift
€ 39,-

Evaluation
223 m (1140 m - 1363 m)
3.2 km 1.8 km 0.9 km 0.5 km
  • 3 ski lifts
€ 41,-

Evaluation
357 m (993 m - 1350 m)
3.2 km 2 km 1.2 km 0 km
  • 3 ski lifts
€ 15,-

Evaluation
205 m (963 m - 1168 m)
3.1 km 1.5 km 1 km 0.6 km
  • 1 ski lift

Evaluation
183 m (1050 m - 1233 m)
3.1 km 2.5 km 0.6 km 0 km
  • 3 ski lifts
€ 10.40

Evaluation
691 m (800 m - 1491 m)
3 km 2 km 1 km 0 km
  • 6 ski lifts
SFr. 35,- / approx. € 38,-

Evaluation
2064 m (1470 m - 3534 m)
3 km 3 km 0 km 0 km
  • 3 ski lifts
€ 55,-

Evaluation
254 m (1412 m - 1666 m)
3 km 0.3 km 1.9 km 0.8 km
  • 4 ski lifts
€ 29,-

Test result
200 m (800 m - 1000 m)
3 km 0.8 km 2.1 km 0.1 km
  • 4 ski lifts
€ 25,-

Evaluation
130 m (1663 m - 1793 m)
3 km 2.5 km 0.5 km 0 km
  • 3 ski lifts
SFr. 34,- / approx. € 36,-

Evaluation
474 m (1298 m - 1772 m)
3 km 1.5 km 1.5 km 0 km
  • 3 ski lifts
  • Heli-skiing
€ 23,-

Evaluation
638 m (920 m - 1558 m)
3 km 1.3 km 1.4 km 0.3 km
  • 4 ski lifts
€ 15,-

Evaluation
214 m (575 m - 789 m)
3 km 1 km 1 km 1 km
  • 1 ski lift
€ 20,-

Evaluation
510 m (750 m - 1260 m)
3 km 2 km 1 km 0 km
  • 1 ski lift

Evaluation
384 m (1354 m - 1738 m)
3 km 0 km 3 km 0 km
  • 2 ski lifts
SFr. 37,- / approx. € 40,-

Evaluation
169 m (1450 m - 1619 m)
3 km 2 km 0.5 km 0.5 km
  • 3 ski lifts
€ 18.80

Test result
335 m (1801 m - 2136 m)
3 km 0.5 km 1.5 km 1 km
  • 2 ski lifts
SFr. 35,- / approx. € 38,-

Evaluation
300 m (720 m - 1020 m)
3 km 2.5 km 0.5 km 0 km
  • 1 ski lift
SFr. 27,- / approx. € 29,-

Evaluation
233 m (905 m - 1138 m)
3 km 0.4 km 2.6 km 0 km
  • 3 ski lifts
€ 21.50

Evaluation
255 m (955 m - 1210 m)
3 km 1 km 2 km 0 km
  • 2 ski lifts
€ 33,-

Evaluation
295 m (699 m - 994 m)
3 km 2 km 1 km 0 km
  • 4 ski lifts
€ 32,-

Evaluation
220 m (720 m - 940 m)
3 km 2 km 1 km 0 km
  • 1 ski lift
SFr. 18,- / approx. € 19,-

Evaluation
180 m (1740 m - 1920 m)
3 km 2 km 1 km 0 km
  • 3 ski lifts
€ 13,-

Evaluation
283 m (1165 m - 1448 m)
3 km 1.7 km 1.3 km 0 km
  • 1 ski lift
€ 21,-

Evaluation
220 m (823 m - 1043 m)
3 km 2 km 1 km 0 km
  • 1 ski lift

Evaluation
251 m (1405 m - 1656 m)
3 km 2 km 1 km 0 km
  • 2 ski lifts

Evaluation
150 m (795 m - 945 m)
3 km 2 km 1 km 0 km
  • 5 ski lifts
€ 24,-

200 m (1000 m - 1200 m)
3 km 1 km 2 km 0 km
  • 4 ski lifts
€ 38.50

Evaluation
284 m (1012 m - 1296 m)
3 km 2 km 1 km 0 km
  • 2 ski lifts
€ 31,-

Evaluation
139 m (1724 m - 1863 m)
3 km 3 km 0 km 0 km
  • 1 ski lift
SFr. 23,- / approx. € 25,-

Evaluation
282 m (1363 m - 1645 m)
3 km 3 km 0 km 0 km
  • 2 ski lifts
SFr. 25,- / approx. € 27,-

Evaluation
200 m (1000 m - 1200 m)
3 km 1.5 km 1.5 km 0 km
  • 2 ski lifts
€ 26,-

Evaluation
153 m (940 m - 1093 m)
3 km 3 km 0 km 0 km
  • 1 ski lift
SFr. 20,- / approx. € 21,-

Evaluation
136 m (1706 m - 1842 m)
3 km 3 km 0 km 0 km
  • 2 ski lifts
€ 12.50

Evaluation
311 m (998 m - 1309 m)
3 km 3 km 0 km 0 km
  • 1 ski lift
SFr. 20,- / approx. € 21,-

Evaluation
290 m (1060 m - 1350 m)
3 km 3 km 0 km 0 km
  • 2 ski lifts
€ 26,-

Evaluation
219 m (815 m - 1034 m)
3 km 3 km 0 km 0 km
  • 3 ski lifts
SFr. 32,- / approx. € 34,-

Evaluation
147 m (1200 m - 1347 m)
2.8 km 1.4 km 1.4 km 0 km
  • 2 ski lifts
€ 31,-

Evaluation
382 m (850 m - 1232 m)
2.8 km 0.6 km 2.2 km 0 km
  • 6 ski lifts
€ 31,-

Evaluation
145 m (680 m - 825 m)
2.8 km 2.8 km 0 km 0 km
  • 3 ski lifts
€ 28,-

Evaluation
160 m (1240 m - 1400 m)
2.6 km 2 km 0.6 km 0 km
  • 2 ski lifts
€ 31,-

Test result
707 m (710 m - 1417 m)
2.5 km 1.5 km 1 km 0 km
  • 3 ski lifts
€ 32,-

Evaluation
1099 m (981 m - 2080 m)
2.5 km 0 km 2.5 km 0 km
  • 3 ski lifts
€ 46,-

Evaluation
189 m (1036 m - 1225 m)
2.5 km 2 km 0.5 km 0 km
  • 3 ski lifts
SFr. 15,- / approx. € 16,-

Evaluation
294 m (899 m - 1193 m)
2.5 km 0.3 km 1.1 km 1.1 km
  • 1 ski lift
€ 30,-

Evaluation
409 m (990 m - 1399 m)
2.5 km 1 km 1.5 km 0 km
  • 4 ski lifts
€ 11,-

Evaluation
160 m (1240 m - 1400 m)
2.5 km 1.3 km 1.2 km 0 km
  • 1 ski lift
SFr. 37,- / approx. € 40,-

Evaluation
480 m (720 m - 1200 m)
2.5 km 1 km 1.5 km 0 km
  • 2 ski lifts
€ 26,-

Evaluation
240 m (1130 m - 1370 m)
2.5 km 1.6 km 0.9 km 0 km
  • 5 ski lifts
€ 34,-

Evaluation
171 m (1076 m - 1247 m)
2.5 km 1.5 km 1 km 0 km
  • 2 ski lifts
€ 14,-

Evaluation
230 m (970 m - 1200 m)
2.5 km 2 km 0.5 km 0 km
  • 3 ski lifts
€ 22,-

Evaluation
221 m (1108 m - 1329 m)
2.5 km 1.5 km 1 km 0 km
  • 2 ski lifts
€ 31,-

Evaluation
178 m (1027 m - 1205 m)
2.5 km 2.5 km 0 km 0 km
  • 2 ski lifts
€ 22,-

Evaluation
212 m (673 m - 885 m)
2.5 km 2.5 km 0 km 0 km
  • 2 ski lifts
€ 28,-

Test result
413 m (778 m - 1191 m)
2.4 km 0.8 km 0.8 km 0.8 km
  • 6 ski lifts
€ 24,-

Evaluation
160 m (1100 m - 1260 m)
2.3 km 1.3 km 0.8 km 0.2 km
  • 1 ski lift
€ 26,-

Evaluation
157 m (1368 m - 1525 m)
2.3 km 1.3 km 0.5 km 0.5 km
  • 2 ski lifts
€ 29,-

Evaluation
206 m (715 m - 921 m)
2.2 km 0.6 km 1.1 km 0.5 km
  • 3 ski lifts
€ 29,-

Evaluation
95 m (715 m - 810 m)
2.2 km 1.2 km 1 km 0 km
  • 3 ski lifts
€ 19,-

Evaluation
275 m (1080 m - 1355 m)
2.2 km 2.2 km 0 km 0 km
  • 4 ski lifts
SFr. 28,- / approx. € 30,-

Evaluation
327 m (1032 m - 1359 m)
2.2 km 2.2 km 0 km 0 km
  • 2 ski lifts
SFr. 32,- / approx. € 34,-

Evaluation
168 m (920 m - 1088 m)
2.2 km 2.2 km 0 km 0 km
  • 3 ski lifts
SFr. 33,- / approx. € 35,-

Evaluation
120 m (1910 m - 2030 m)
2 km 2 km 0 km 0 km
  • 2 ski lifts
€ 51.50

Evaluation
128 m (1312 m - 1440 m)
2 km 1 km 0.5 km 0.5 km
  • 2 ski lifts
€ 30,-

Evaluation
150 m (1250 m - 1400 m)
2 km 1 km 0.8 km 0.2 km
  • 1 ski lift
€ 26,-

Evaluation
180 m (840 m - 1020 m)
2 km 1.2 km 0.5 km 0.3 km
  • 2 ski lifts
€ 25,-

Evaluation
176 m (1244 m - 1420 m)
2 km 0.1 km 0.9 km 1 km
  • 2 ski lifts
€ 44,-

Evaluation
140 m (1290 m - 1430 m)
2 km 0.5 km 1.5 km 0 km
  • 1 ski lift
€ 6,-

Evaluation
122 m (1585 m - 1707 m)
2 km 1 km 1 km 0 km
  • 2 ski lifts

Evaluation
120 m (1120 m - 1240 m)
2 km 1.3 km 0.7 km 0 km
  • 1 ski lift

Evaluation
200 m (900 m - 1100 m)
2 km 1 km 1 km 0 km
  • 2 ski lifts

Evaluation
169 m (1371 m - 1540 m)
2 km 2 km 0 km 0 km
  • 2 ski lifts
SFr. 36,- / approx. € 39,-

Evaluation
220 m (845 m - 1065 m)
2 km 2 km 0 km 0 km
  • 1 ski lift
SFr. 30,- / approx. € 32,-

Evaluation
115 m (1052 m - 1167 m)
2 km 1.4 km 0.6 km 0 km
  • 2 ski lifts
€ 19,-

Evaluation
180 m (940 m - 1120 m)
2 km 2 km 0 km 0 km
  • 3 ski lifts
€ 30.50

Evaluation
91 m (1447 m - 1538 m)
2 km 2 km 0 km 0 km
  • 3 ski lifts
SFr. 27,- / approx. € 29,-

Evaluation
170 m (1015 m - 1185 m)
2 km 2 km 0 km 0 km
  • 1 ski lift
SFr. 20,- / approx. € 21,-

Evaluation
371 m (1207 m - 1578 m)
2 km 2 km 0 km 0 km
  • 3 ski lifts
SFr. 32,- / approx. € 34,-

Evaluation
183 m (1050 m - 1233 m)
2 km 2 km 0 km 0 km
  • 1 ski lift
€ 28,-

Evaluation
85 m (1468 m - 1553 m)
2 km 2 km 0 km 0 km
  • 1 ski lift

Evaluation
126 m (770 m - 896 m)
2 km 2 km 0 km 0 km
  • 2 ski lifts
€ 22,-

Evaluation
115 m (785 m - 900 m)
2 km 0.5 km 1.5 km 0 km
  • 3 ski lifts
€ 24.20

Evaluation
195 m (918 m - 1113 m)
2 km 2 km 0 km 0 km
  • 2 ski lifts
SFr. 27,- / approx. € 29,-

Evaluation
281 m (765 m - 1046 m)
2 km 2 km 0 km 0 km
  • 2 ski lifts
SFr. 20,- / approx. € 21,-

Evaluation
170 m (1050 m - 1220 m)
2 km 1.5 km 0.5 km 0 km
  • 3 ski lifts
€ 28,-

Evaluation
900 m (830 m - 1730 m)
1.9 km 1.9 km 0 km 0 km
  • 5 ski lifts
€ 32,-

Evaluation
200 m (800 m - 1000 m)
1.9 km 1 km 0.9 km 0 km
  • 2 ski lifts
€ 20,-

Test result
95 m (770 m - 865 m)
1.8 km 1.7 km 0.1 km 0 km
  • 2 ski lifts

Evaluation
115 m (720 m - 835 m)
1.8 km 0.8 km 0.6 km 0.4 km
  • 1 ski lift
SFr. 18,- / approx. € 19,-

Evaluation
360 m (1740 m - 2100 m)
1.8 km 1 km 0.8 km 0 km
  • 2 ski lifts
€ 32,-

Evaluation
128 m (1007 m - 1135 m)
1.8 km 0.9 km 0.9 km 0 km
  • 1 ski lift
€ 20,-

Evaluation
178 m (1197 m - 1375 m)
1.7 km 1.1 km 0.6 km 0 km
  • 2 ski lifts

Evaluation
155 m (432 m - 587 m)
1.7 km 0 km 1.7 km 0 km
  • 1 ski lift
€ 17.50

Evaluation
230 m (850 m - 1080 m)
1.7 km 1.7 km 0 km 0 km
  • 2 ski lifts
SFr. 27,- / approx. € 29,-

Evaluation
200 m (1100 m - 1300 m)
1.7 km 0 km 1.7 km 0 km
  • 2 ski lifts
€ 19,-

Evaluation
109 m (940 m - 1049 m)
1.7 km 1 km 0.7 km 0 km
  • 3 ski lifts
€ 27.50

Evaluation
210 m (650 m - 860 m)
1.6 km 1.2 km 0.4 km 0 km
  • 3 ski lifts
€ 25,-

Evaluation
173 m (1428 m - 1601 m)
1.5 km 0.1 km 1.4 km 0 km
  • 4 ski lifts
SFr. 32,- / approx. € 34,-

Evaluation
316 m (866 m - 1182 m)
1.5 km 0.2 km 1.3 km 0 km
  • 2 ski lifts

Test result
115 m (1050 m - 1165 m)
1.5 km 1 km 0.5 km 0 km
  • 1 ski lift
€ 19,-

Evaluation
85 m (1290 m - 1375 m)
1.5 km 0.5 km 1 km 0 km
  • 2 ski lifts
€ 26,-

Evaluation
129 m (951 m - 1080 m)
1.5 km 1 km 0.5 km 0 km
  • 4 ski lifts
€ 14.50

Evaluation
175 m (725 m - 900 m)
1.5 km 1 km 0.5 km 0 km
  • 2 ski lifts

Evaluation
125 m (1150 m - 1275 m)
1.5 km 1.2 km 0.3 km 0 km
  • 2 ski lifts
SFr. 16,- / approx. € 17,-

Evaluation
85 m (1110 m - 1195 m)
1.5 km 1.5 km 0 km 0 km
  • 2 ski lifts
€ 12,-

Evaluation
250 m (1250 m - 1500 m)
1.5 km 1.5 km 0 km 0 km
  • 2 ski lifts
€ 25,-

Evaluation
293 m (900 m - 1193 m)
1.5 km 1.5 km 0 km 0 km
  • 2 ski lifts
SFr. 27,- / approx. € 29,-

Evaluation
65 m (770 m - 835 m)
1.5 km 1.5 km 0 km 0 km
  • 2 ski lifts

Evaluation
60 m (750 m - 810 m)
1.5 km 1.5 km 0 km 0 km
  • 2 ski lifts
€ 24,-

Evaluation
152 m (1760 m - 1912 m)
1.5 km 1.5 km 0 km 0 km
  • 3 ski lifts
SFr. 39,- / approx. € 42,-

Evaluation
170 m (670 m - 840 m)
1.5 km 1.5 km 0 km 0 km
  • 2 ski lifts

Evaluation
120 m (980 m - 1100 m)
1.4 km 0.7 km 0.7 km 0 km
  • 1 ski lift
€ 28.50

Evaluation
365 m (1312 m - 1677 m)
1.4 km 0 km 1.4 km 0 km
  • 1 ski lift

Evaluation
131 m (503 m - 634 m)
1.3 km 1 km 0.3 km 0 km
  • 3 ski lifts
€ 17,-

Evaluation
143 m (1227 m - 1370 m)
1.3 km 0.7 km 0.6 km 0 km
  • 1 ski lift
SFr. 84,- / approx. € 90,-

Evaluation
72 m (1030 m - 1102 m)
1.3 km 1 km 0.3 km 0 km
  • 5 ski lifts
€ 24,-

Evaluation
335 m (1365 m - 1700 m)
1.3 km 0.8 km 0 km 0.5 km
  • 3 ski lifts
€ 10,-

Evaluation
100 m (1100 m - 1200 m)
1.3 km 1.1 km 0.2 km 0 km
  • 1 ski lift
SFr. 28,- / approx. € 30,-

Evaluation
45 m (955 m - 1000 m)
1.2 km 0.6 km 0.6 km 0 km
  • 2 ski lifts
€ 37.50

Evaluation
140 m (1260 m - 1400 m)
1.2 km 0.7 km 0.5 km 0 km
  • 1 ski lift

Evaluation
106 m (1379 m - 1485 m)
1.2 km 1.2 km 0 km 0 km
  • 1 ski lift
SFr. 18,- / approx. € 19,-

Evaluation
120 m (920 m - 1040 m)
1.2 km 1.2 km 0 km 0 km
  • 1 ski lift
SFr. 24,- / approx. € 26,-

Evaluation
158 m (822 m - 980 m)
1.2 km 1.2 km 0 km 0 km
  • 1 ski lift

Evaluation
120 m (570 m - 690 m)
1.2 km 0.6 km 0.6 km 0 km
  • 2 ski lifts

Evaluation
135 m (870 m - 1005 m)
1.2 km 1.2 km 0 km 0 km
  • 1 ski lift

Evaluation
112 m (1333 m - 1445 m)
1.2 km 1.2 km 0 km 0 km
  • 2 ski lifts
SFr. 27,- / approx. € 29,-

Evaluation
168 m (1186 m - 1354 m)
1.2 km 1.2 km 0 km 0 km
  • 2 ski lifts
SFr. 30,- / approx. € 32,-

Evaluation
165 m (946 m - 1111 m)
1.1 km 0.1 km 1 km 0 km
  • 3 ski lifts
€ 18,-

Evaluation
137 m (1443 m - 1580 m)
1.1 km 0.6 km 0.5 km 0 km
  • 1 ski lift

Evaluation
205 m (1370 m - 1575 m)
1.1 km 0.5 km 0.6 km 0 km
  • 2 ski lifts

Evaluation
98 m (1386 m - 1484 m)
1.1 km 1.1 km 0 km 0 km
  • 1 ski lift
€ 18,-

Evaluation
118 m (663 m - 781 m)
1.1 km 0 km 1.1 km 0 km
  • 1 ski lift
€ 21,-

Evaluation
120 m (830 m - 950 m)
1.1 km 0 km 1.1 km 0 km
  • 1 ski lift

Evaluation
105 m (1545 m - 1650 m)
1.1 km 1.1 km 0 km 0 km
  • 2 ski lifts

Evaluation
85 m (790 m - 875 m)
1.1 km 0.8 km 0.3 km 0 km
  • 2 ski lifts
€ 14,-

Evaluation
62 m (937 m - 999 m)
1.1 km 1.1 km 0 km 0 km
  • 2 ski lifts
€ 13.50

Test result
79 m (1189 m - 1268 m)
1 km 1 km 0 km 0 km
  • 1 ski lift
€ 19,-

Test result
90 m (1830 m - 1920 m)
1 km 1 km 0 km 0 km
  • 5 ski lifts
SFr. 35,- / approx. € 38,-

Test result
86 m (918 m - 1004 m)
1 km 1 km 0 km 0 km
  • 1 ski lift
€ 20.50

Test result
138 m (722 m - 860 m)
1 km 0.5 km 0.5 km 0 km
  • 2 ski lifts
€ 22,-

Evaluation
124 m (1218 m - 1342 m)
1 km 0 km 0.5 km 0.5 km
  • 1 ski lift
€ 26,-

Evaluation
75 m (1345 m - 1420 m)
1 km 0 km 1 km 0 km
  • 1 ski lift

Evaluation
135 m (1215 m - 1350 m)
1 km 1 km 0 km 0 km
  • 3 ski lifts
SFr. 31,- / approx. € 33,-

Evaluation
190 m (1050 m - 1240 m)
1 km 0.5 km 0.5 km 0 km
  • 1 ski lift
€ 24,-

Evaluation
63 m (495 m - 558 m)
1 km 0.7 km 0.3 km 0 km
  • 2 ski lifts
€ 14,-

Evaluation
120 m (600 m - 720 m)
1 km 0.5 km 0.5 km 0 km
  • 1 ski lift

Evaluation
90 m (1320 m - 1410 m)
1 km 0.2 km 0.8 km 0 km
  • 1 ski lift

Evaluation
200 m (1050 m - 1250 m)
1 km 0.3 km 0.7 km 0 km
  • 3 ski lifts
€ 31,-

Evaluation
40 m (1450 m - 1490 m)
1 km 1 km 0 km 0 km
  • 1 ski lift
€ 24.50

Evaluation
236 m (764 m - 1000 m)
1 km 0.2 km 0.8 km 0 km
  • 2 ski lifts
€ 29.50

Evaluation
158 m (1281 m - 1439 m)
1 km 1 km 0 km 0 km
  • 1 ski lift
SFr. 20,- / approx. € 21,-

Evaluation
90 m (1085 m - 1175 m)
1 km 1 km 0 km 0 km
  • 1 ski lift
€ 10,-

Evaluation
200 m (1210 m - 1410 m)
1 km 1 km 0 km 0 km
  • 1 ski lift
€ 20,-

Evaluation
79 m (830 m - 909 m)
1 km 1 km 0 km 0 km
  • 2 ski lifts
€ 17,-

Evaluation
40 m (1180 m - 1220 m)
1 km 1 km 0 km 0 km
  • 1 ski lift
SFr. 18,- / approx. € 19,-

Evaluation
70 m (1180 m - 1250 m)
1 km 1 km 0 km 0 km
  • 2 ski lifts
SFr. 22,- / approx. € 24,-

Evaluation
169 m (513 m - 682 m)
1 km 1 km 0 km 0 km
  • 1 ski lift
SFr. 18,- / approx. € 19,-

Evaluation
67 m (1020 m - 1087 m)
1 km 1 km 0 km 0 km
  • 2 ski lifts
€ 7.90

Evaluation
62 m (1022 m - 1084 m)
1 km 1 km 0 km 0 km
  • 1 ski lift
SFr. 28,- / approx. € 30,-

Evaluation
252 m (1195 m - 1447 m)
1 km 1 km 0 km 0 km
  • 1 ski lift
SFr. 28,- / approx. € 30,-

Evaluation
65 m (930 m - 995 m)
1 km 1 km 0 km 0 km
  • 2 ski lifts
€ 37.50

Evaluation
93 m (1381 m - 1474 m)
1 km 1 km 0 km 0 km
  • 1 ski lift
€ 17,-

Evaluation
180 m (922 m - 1102 m)
1 km 1 km 0 km 0 km
  • 1 ski lift
€ 24,-

Evaluation
85 m (850 m - 935 m)
1 km 1 km 0 km 0 km
  • 1 ski lift
SFr. 20,- / approx. € 21,-
651-850 out of 1154 ski resorts