Translations:AY Honors/Snowboarding/Answer Key/38/en

! Trail Rating !! Symbol !! Level of difficulty !! Description |- | Green circle | | Easiest | style="text-align:left;" | The easiest slopes at a mountain. Generally, Green Circle trails are wide and groomed, with slope grades ranging from 6% to 25%. |- | Blue square | | Intermediate More Difficult | style="text-align:left;" | Intermediate difficulty slopes. Generally, Intermediate trails are groomed, with grades ranging from 25% to 40%. Blue Square trails make up the bulk of pistes at most ski areas. |- | Black diamond | | Advanced Most Difficult | style="text-align:left;" | Amongst the most difficult slopes at a mountain. Generally, Black Diamond trails are steep (40% and up) and may or may not be groomed. |- | Double black diamond | | Expert Only Extremely Difficult | style="text-align:left;" | 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. This trail rating is fairly new; by the 1980s, technological improvements in trail construction and maintenance, coupled with intense marketing competition, led to the creation of a Double Black Diamond rating. |- | Variations | | Various | style="text-align:left;" | Variations such as doubling a symbol to indicate increased difficulty, or combining two different symbols to indicate intermediate difficulty are occasionally used, as is often in Colorado at Winter Park resort and other Colorado ski resorts. One example is a diamond overlapping a square to indicate a trail rating between a Blue Square and a Black Diamond, colloquially a 'Blue-Black'. This is used by several eastern resorts, especially in New York with notable examples being at Windham and Hunter Mountain Ski Resort. 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).