北美和中国 对滑雪场雪道难度的划分
标签：雪道难度标志雪道难度划分滑雪技术术语中国和美国雪道等级
1.北美的雪道难度划分
划分
难度
描述
Green circle
绿道
Easiest
最易
The easiest slopes at a mountain. Green Circle trails are generally wide and groomed, typically with slope gradients ranging from 6% to 25%[2] (a 100% slope is a 45 degree angle). 坡度为6-25 度
Blue square
兰道
Intermediate
中级
Intermediate difficulty slopes with grades commonly ranging from 25% to 40%.[2] These slopes are usually groomed. Blue Square runs make up the bulk of pistes at most ski areas, and areusually among the most heavily trafficked. 坡度为25-40 度， 雪道内通常压雪
Black diamond
黑道
Advanced
高级
Amongst the most difficult at a given mountain. Black Diamond trails tend to be steep (typically 40% and up)[2] and may or may not be groomed, though the introduction of winch-cats has made the grooming of steep slopes both possible and more frequent. 超过40度， 道内或许不压雪道
Double black diamond
双黑道
Expert Only
仅限于
专家级
These trails are even more difficult than Black Diamond, due to exceptionally steep slopes and other hazards such as narrow trails, exposure to wind, and the presence of obstacles such as steep drop-offs or trees. They are intended only for the most experienced skiers. 有不可预见的陡坡和窄道，风口，断崖。
.
极限地形公园（TERRAIN PARKS）：
Terrain parksare whole or portions of trails that can offer a variety of jumps, half-pipes, and other special 'extreme' sporting obstacles beyond traditional moguls. The trails are typically represented by an orange rectangle with rounded corners. 橙色， 有各种包，U 槽等障碍物，用于极限滑雪。 国内也叫单板公园。
Usually, the terrain park will carry its own trail rating, indicating the level of challenge. A terrain park with a Black Diamond or Double Black Diamond rating would contain greater and more challenging obstacles than a park with a Blue Square rating 有的地形公园的头部也会有一个或两个黑色菱形标志，比前面标有蓝色方块的更难些。
混合标志的特例：
Variations such as doubling a symbol to indicate increased difficulty, or combining two different symbols to indicate intermediate difficulty are occasionally used. One example is a diamond overlapping a square to indicate a trail rating betweena Blue Square and a Black Diamond. Many resorts throughout Colorado use a double diamond with an 'EX' in the center to mark a run with extreme terrain, even more difficult than a double diamond. Other resorts, such as Smugglers' Notch, Vermont, Le Massif, Quebec, and Mt. Bohemia, Michigan, use triple black diamonds. The combination of symbols is comparatively rare at U.S. ski areas; most ski resorts stick to the standard 4-symbol progression (with the exception of the common EX runs in Colorado).
Non-standard symbols for standard ratings may be encountered at some ski areas. Bogus Basin, a resort near Boise, Idaho, uses orange diamonds on trailheads for trails that are indicated in the resort's Alpine Guide as double black diamonds。 两个相同符号标志的雪道， 或两个不同标志的雪道，比
单个标志符号的难度更大些。 在COLORADA 的很多雪场，两个黑色菱形标注中间有个'EX'符号，比双黑道更难。也有很多地方（例如Smugglers' Notch, Vermont, Le Massif, Quebec, and Mt. Bohemia, Michigan,）使用三个黑色菱形代表更难。极其个别的雪场（例如BOGUS BASIN）使用橙色的标志代表双黑道。
2. 中国的雪道难度划分
雪道上有道标，不同颜色和形状代表不同级别。根据中国滑雪协会的划分如下：
绿色圆圈是初学者雪道，坡度大概是不超过40度。
蓝色方块是中级雪道，大概是不超过65度，
黑色钻石雪道。比蓝色更难的就是高级道。
每一色中当然也有容易，中等，困难之分，而且相差相当大，比如5 度和40度都可以是绿道。一般来说，越好的雪场，难度越高。世界一流的雪场的绿色雪道有的会比通常雪场的蓝色雪道更陡。黑钻中还有双黑钻这一级别，是顶级难度的雪道。