Piste

A piste in Serfaus, Austria

Pistes on Bald Mountain, Idaho

A piste (/piːst/)^[1] is a marked ski run or path down a mountain for snow skiing, snowboarding, or other mountain sports.

This European term is French^[2] ("trail", "track") and synonymous with 'trail', 'slope', or 'run' in North America. The word is pronounced using a long "e" sound so that it rhymes with "beast".^[1]

North Americans employ its common European antonym, 'off piste', to describe backcountry skiing, especially when referring to skiing outside officially approved areas of a ski resort.^{[citation needed]}

Construction

Pistes are not naturally occurring features, and must be created through human means. This can be done by "clearing" (removing the trees only) or by "grading" (clearing followed by reshaping of the surface by machines like graders).^[3]

Maintenance

Moguls on a slope in Les Arcs, France

A piste in Pohorje, Slovenia, created with artificial snowmaking

A freshly groomed piste in Oberstdorf, Germany

Pistes are usually maintained using tracked vehicles known as snowcats to compact or "groom" the snow to even out trail conditions, remove moguls, and redistribute snow to extend the ski season. Natural snow is often augmented with snow making machines and snow reserves, early in the season or when the snowpack is low, and to ensure the snow lasts throughout the season.

Ratings

Typically, grading is done by the resort, and grades are relative to other trails within that resort. As such, they are not classified to an independent standard; although they are likely to be roughly similar, skiers should be cautious about assuming that grades in two different resorts are absolutely equivalent.

North America, Australia and New Zealand

A comparison of typical ski trail ratings in North America, Australia, and New Zealand

A typical sign indicating ski slopes and their difficulty

A piste in Collingwood, Canada

In North America, Australia and New Zealand, a color–shape rating system is used to indicate the comparative difficulty of trails (otherwise known as slopes or pistes).

The steepness of ski trails is usually measured by grade (as a percentage) instead of degree angle. In general, beginner slopes (green circle) are between 6% and 25%. Intermediate slopes (blue square) are between 25% and 40%. Difficult slopes (black diamond) are 40% and up. However, this is just a general "rule of thumb". Although slope gradient is the primary consideration in assigning a trail difficulty rating, other factors come into play. A trail will be rated by its most difficult part, even if the rest of the trail is easy. Ski resorts assign ratings to their own trails, rating a trail compared only with other trails at that resort. The resort may take into consideration the width of the trail, sharpest turns, terrain roughness, the direction of the fall line, and whether the trail is groomed regularly.

Ski trail difficulty ratings in North America, Australia, and New Zealand

Trail rating		Level of difficulty	Description
Green circle		Easiest	The easiest slopes at a mountain. Generally, Green Circle trails are wide and groomed, with slope grades ranging from 6% to 25%[4]
Blue square		Intermediate	Intermediate difficulty slopes. Generally, Intermediate trails are groomed, with grades ranging from 25% to 40%.[4] Blue Square trails make up the bulk of pistes at most ski areas.[citation needed]
Black diamond		Advanced Difficult	Amongst the most difficult slopes at a mountain. Generally, Black Diamond trails are steep (40% and up)[4] and may or may not be groomed.
Double black diamond		Very Difficult	These trails are 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 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.
Triple black diamond		Expert Only	These trails are even more difficult than Double Black Diamonds, due to even more exceptionally steep slopes and other hazards such as narrow trails, exposure to wind, and the presence of obstacles such as steep drop-offs or a lot of trees. They are intended only for the most experienced skiers and good equipment is recommended. Some have grades that can almost reach 90%. These formidable trails are among the rarest.
Variations		Various	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, with notable example being at Windham, New York. 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, Big Sky, Montana 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 trailhead signs considered to be more difficult than double black diamonds; however, those trails are indicated on the trail map as double black diamonds.[5] Jiminy Peak, Massachusetts uses two variations of normal trail ratings; one is a blue square with a green circle inside of it used to represent an easy-intermediate trail. The other is a blue square with a single black diamond in it, used to represent an intermediate-hard trail.
Terrain parks		Various	Terrain parks are 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. 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. Typically, a skier would be able to descend through a terrain park without necessarily negotiating any of its features, making this a possible easier way down than other options.

Europe

A comparison of typical piste ratings in Europe

Blue piste markers in Kronplatz, Italy

Sign for a black expert slope in Flaine, France

In Europe, pistes are classified by a color-coded system. The actual color system differs in parts for each country, although in all countries blue (easy), red (intermediate) and black (expert) are used. Shapes are often not used, sometimes all ratings are circles as being defined in the basic rules of the German Skiing Association DSV.^[6] The three basic color codes of the DSV have been integrated into the national standards DIN 32912 in Germany and ÖNORM S 4610 f in Austria.

In Scandinavia, a similar system is used with the addition of shapes, simplifying the identification of snow covered signs (see table below).

Slopes marked green, blue or red are groomed in all countries; blacks are groomed in Italy, Austria, Switzerland and Scandinavian resorts, while in France most black slopes are not groomed, but some are. All other classifications are generally not groomed. Sometimes slopes are marked on piste maps as dotted or as dashed lines, this also signifies that the slope is not groomed.

Ski piste difficulty ratings in Europe, excluding Scandinavia

Piste rating		Level of difficulty	Description
Green		Learning/beginner	France, Poland, Spain, Bulgaria, UK and other countries. These are usually not marked trails, but tend to be large, open, gently sloping areas at the base of the ski area or traverse paths between the main trails.
Blue		Easy	These are almost always groomed. The slope gradient does not normally exceed 25% except for short wide sections with a higher gradient.
Red		Intermediate	Steeper or narrower than a blue slope, these are usually groomed, unless the narrowness of the trail prohibits it. The slope gradient does not normally exceed 40% except for short wide sections with a higher gradient.
Black		Advanced or expert	Steep, may or may not be groomed, or may be groomed for mogul skiing. In Austria, Italy and Switzerland black pistes are nearly always groomed, as non-groomed pistes are marked as skiroutes or itineraires (see below); in France, some black pistes are groomed, but most are not. Black can be a very wide classification, ranging from a slope marginally more difficult than a red, to very steep avalanche chutes like the infamous Couloirs of Courchevel. France tends to have a higher limit between red and black.[citation needed]
Orange		Extremely difficult	Austria, Switzerland, and certain other areas only. In a small number of areas, orange is used to mark pistes that are more difficult than black.
Yellow		Skiroute, itinéraire, or freerideroute	In recent years, many areas reclassified some black slopes to yellow slopes. These are ungroomed and unpatrolled routes which are actually off-piste skiing, but marked and secured from avalanches. Famous examples are the Stockhorn area in Zermatt and the Tortin slopes in Verbier. In Austria, skiroutes are usually marked with orange squares instead. It is also common to mark these routes with a red diamond or a red diamond with black edges, the latter being more difficult.
Orange square
Red diamond
Red diamond with black edges

Alpine slope classification in Europe is less rigidly tied to slope angle than in North America. A lower angle slope may be classified as more difficult than a steeper slope if it requires better skiing ability because, for example, it is narrower, requires carrying speed through flatter sections or controlling speed through sharp hairpin turns, or features off-camber slope angles or exposed rock.

Scandinavia

In Norway, Sweden^[7] and Finland,^[8] a system is used with similar colours as elsewhere in Europe, but with shapes as well.

Ski piste difficulty ratings in Scandinavia

Piste rating		Level of difficulty	Description
Green circle		Very easy	Up to 9° (16%) slope.
Blue square		Easy	Up to 15° (27%) slope.
Red rectangle		Moderately difficult	Up to 25° (47%) slope.
Black diamond		Difficult	Over 25° (47%) slope. Triple black diamond may also be used in some areas.
Double black diamond		Very difficult

Japan

Japan uses a color-coded system, but shapes do not usually accompany them. Some resorts, mainly those catering to foreigners, use the North American or European color-coding system, adding to the confusion. The usual ratings are:

Ski piste difficulty ratings in Japan

Piste rating		Level of difficulty	Description
Green		Beginner	These are usually near the base of the mountain, although some follow switchback routes down from the top.
Red		Intermediate	At most ski areas in Japan, these constitute the majority of the slopes.[citation needed]
Black		Expert	Expert slopes. These are the steepest and most difficult slopes at the ski area. The difficulty of these compared to like-classified slopes at other ski areas is heavily dependent on the target audience.

Japan has more than 1000 ski areas (115 in Nagano Prefecture alone),^[9] many of them small and family-oriented, so comparisons between slope classifications in Japan and "equivalent" slopes in Europe or North America can be misleading.

See also

• Cross-country skiing trail
• Dry ski slope
• Night skiing
• Snow road
• Trail difficulty rating system

References

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