The height of the mountain is the difference in height between the lowest and highest point. Tall mountains can offer longer pistes, better views, and often better snowfall.
The opening hours is the average number of hours per day that the resort is open for skiing. Long opening hours mean you can go for an early ski, or have a long sleep and go later.
Ski trail difficulty is measured in "percent slope", a system in which a 100% slope equals a 45-degree angle. Medium difficulty trails (marked with a blue square) have a slope gradient between 25% and 40%. These trails are ideal for regular skiers.
In resorts which allow off piste-skiing, you can ski anywhere which is great for adventurous types. However, there are hazards such cliff edges, avalanches or simply getting lost and suffering exhaustion.
This is the amount of people that can be transported by ski lifts etc. per hour. A bigger uphill capacity can indicate less waiting time, although it will be affected by how busy the resort is.
Ice climbing is a great sport for adrenalin seekers. It entails climbing frozen cliff edges/waterfalls using tools such as ice axes in order to grip the surface.