北美和中國 對滑雪場雪道難度的劃分
標簽：雪道難度標志雪道難度劃分滑雪技術術語中國和美國雪道等級
1.北美的雪道難度劃分
劃分
難度
描述
Green circle
綠道
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). 坡度為6-25 度
Blue square
蘭道
Intermediate
中級
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. 坡度為25-40 度， 雪道內通常壓雪
Black diamond
黑道
Advanced
高級
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. 超過40度， 道內或許不壓雪道
Double black diamond
雙黑道
Expert Only
僅限于
專家級
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. 有不可預見的陡坡和窄道，風口，斷崖。
.
極限地形公園（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， 有各種包，U 槽等障礙物，用于極限滑雪。 國內也叫單板公園。
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 有的地形公園的頭部也會有一個或兩個黑色菱形標志，比前面標有藍色方塊的更難些。
混合標志的特例：
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。 兩個相同符號標志的雪道， 或兩個不同標志的雪道，比
單個標志符號的難度更大些。 在COLORADA 的很多雪場，兩個黑色菱形標注中間有個'EX'符號，比雙黑道更難。也有很多地方（例如Smugglers' Notch, Vermont, Le Massif, Quebec, and Mt. Bohemia, Michigan,）使用三個黑色菱形代表更難。極其個別的雪場（例如BOGUS BASIN）使用橙色的標志代表雙黑道。
2. 中國的雪道難度劃分
雪道上有道標，不同顏色和形狀代表不同級別。根據中國滑雪協會的劃分如下：
綠色圓圈是初學者雪道，坡度大概是不超過40度。
藍色方塊是中級雪道，大概是不超過65度，
黑色鉆石雪道。比藍色更難的就是高級道。
每一色中當然也有容易，中等，困難之分，而且相差相當大，比如5 度和40度都可以是綠道。一般來說，越好的雪場，難度越高。世界一流的雪場的綠色雪道有的會比通常雪場的藍色雪道更陡。黑鉆中還有雙黑鉆這一級別，是頂級難度的雪道。
