1. Easy
Light physical activity, usually walking or hiking, that is good for most fitness levels. Also suitable for children and elderly people. Perfect for whose who have never been to the mountains and who want to try it out.

2. Moderate
Activity involves daily walking for 3-5 hours a day, usually multi-day treks or long 1-day hikes that require a high level of physical activity. Suitable for people with an average level of physical fitness.

3. Challenging
Activity involves daily walking for 3-5 hours a day at various types of terrain (rough trails, partially exposed areas with danger of falling, gravel plains, pathless steep terrain) or high-altitude treks above 2000 meters. Requires an average to above average fitness level.

4. Strenuous
Activity involves walking up to 6-7 hours a day in fairly difficult terrain (steep rocky slopes, snow covered glaciers or firn fields with danger of slipping) or high-altitude treks above 3000 meters. Requires an above average fitness level and high level of stamina.

5. Extreme
Activity involves walking up to 6-10 hours a day with difficult terrain and conditions (tricky rocky slopes or snow covered glaciers with increased danger of slipping), strenuous high-altitude treks at 4000-5600 meters. Requires very high level of physical fitness and stamina, as well as good practical experience of multi-day trekking on high altitudes.

0. No requirements/ minimal requirements
Easy hiking/ trekking with non-technical elements. No certain knowledge or experience is required for this activity.

1. Beginner
Basic navigation skills are required if hiking/ trekking without a guide. Previous hiking/ trekking experience is not required, but desirable. No danger of falling with appropriate behaviour.

2. Intermediate
Average navigation skills are required if hiking/ trekking without a guide. Basic alpine experience is needed.

3. Advanced
Path not necessarily available. Sometimes need to use hands to keep going. Terrain assessment, good navigation skills and good alpine experience is required.

4. Professional
Mostly without a path and unmarked, might involve some climbing sections. Excellent navigation skills are required even if trekking with a guide. Proven alpine experience, mountaineering skills and familiarity with alpine equipment are required.

1. Easy
1-day or multi-day climbs at an altitude up to 3000 meters. Easy, mostly walking terrain. Good for most fitness levels. Also suitable for children and elderly people. Perfect for those who have never climbed a mountain and who want to try it out.

2. Moderate
1-day or multi-day climbs at an altitude of up to 3000 meters with some technical elements. Mostly walking terrain. Requires an average level of physical fitness.

3. Challenging
Multi-day climbs with longer and more exposed climbing areas at the altitude up to 5000-6000 meters. Requires high endurance to walk several days for about 4-6 hours a day. Steeper slopes, many crevasses. Requires an average to above average fitness level.

4. Strenuous
Strenuous climbs at altitudes of 5000-7000 meters. Requires high endurance to walk and climb on a moderate snow and ice slopes for several days for up to 8 hours a day. Continuously steep terrain, wall passages that require great commitment. Requires an above average fitness level and high level of stamina.

5. Extreme
Extremely challenging climbs for experienced mountaineers, high altitudes up to 8848 meters. Requires extremely high level of physical fitness and stamina, as well as great practical experience of technical mountaineering.

0. No requirements/ minimal requirements
Easy climbs with non-technical elements. No certain knowledge or experience is required for this activity.

1. Beginner
Climbing sections clearly arranged and unproblematic. Might include short steep passages and a few crevasses. Increased step safety is necessary. No prior experience is required, all necessary techniques will be explained by the guide before or during the climb.

2. Intermediate
Good navigational skills and efficient rope handling required, long climbing sections. Basic experience in using crampons and ice axes is required.

3. Advanced
Good sense of orientation en route, efficient rope handling, long climbs, requires securing at halting-points. Requires proficiency in basic mountaineering skills including: cramponing, walking on snow, self-arrest, crevasse rescue, and glacier travel on a rope team.

4. Professional
Extremely steep, partly overhanging wall passages, ice climbing sections. Requires proficiency in basic and advanced mountaineering skills including: cramponing, walking on snow, self-arrest, crevasse rescue, and glacier travel on a rope team.

1. Easy
Simplest form of rock/ice climbing (several pitches of easy roped climbing). Hands/ice tools required for balance. Beginners will be secured to the rope. Good for most fitness levels, requires interest and determination.

2. Moderate
Half a day or less for the technical portion of the route. Vertical places or overhangs with good grip require physical effort. A head for heights and good level of physical fitness are advised.

3. Challenging
Most of the day or a full day of roped or technical climbing (one or two pitches). Greater physical requirements, climbing technique and experience. Requires an average to above average fitness level.

4. Strenuous
Typically requires an overnight on the route, two or more days of hard climbing. Above-average ability and good level of training required.

5. Extreme
Remote walls climbed in alpine style. Multi-day routes with a hard climbing. Only achievable through increased training, considerable strength in the arms and hands and improved equipment. Excellent physical conditioning is a must.

0. No requirements/ minimal requirements
No certain knowledge or experience is required for this activity. All necessary techniques will be explained by the guide before or during the climb.

1. Beginner
Movement with simple combinations of steps and handles (three-point-technique). Intermediate securing at exposed points is recommended. Frequent use of hands/ice tools is required to support balance and hand and foot-holds must be trusted.

2. Intermediate
Here real climbing begins, that requires the movement of one limb at a time and a proper setting of the movements. Holds and supports are still abundant. The rock/ice structure, already more steep or even vertical, offers holds and supports the rarest and can already require the use of force. Typically the passages are not solved yet in an obliged manner.

3. Advanced
Holds and supports become more rare and / or small. It requires a good climbing technique applied to the various rock/ice structures (chimneys, crevices, corners, etc.) as well as a certain degree of specific training. The climbing becomes delicate (slabs, etc..) or hard (by opposition or interlocking in slits and chimneys). Usually requires the prior examination of the passage.

4. Professional
Handholds/Mixed ice and rock are small/very thin and unstable, widely spread and arranged so as to require a particular combination of movements well studied. Rock/ice structure may force you to climb very delicate or very hard where overhanging. It requires a sophisticated training with particular development of finger strength, skill in balancing and grip techniques.

1. Easy
Easy physical activity lasting from a few hours and up to a full day and requiring basic level of fitness. The absolute altitude is up to 2000 meters above sea level, with an altitude gain of 600-900 meters. The ascent speed is 200-250 meters/hour.

2. Moderate
Moderate physical activity lasting for up to one day and requiring basic or above basic level of fitness. The absolute altitude is up to 2500-3000 meters above sea level and the altitude gain is over a 1000 meters. On such altitudes you may notice some difficulty breathing. Participants should be comfortable with the ascent speed of 300 meters/hour.

3. Challenging
Challenging physical activity lasting up to two days and requiring a good level of fitness. The absolute altitude is up to 3000-3500 meters above sea level and the altitude gain is at least 1200 meters and up to 1500+ meters. Activities on such altitude require certain acclimatization. The ascent speed of 350+ meters/hour is recommended.

4. Strenuous
Serious physical activity lasting two days or more, requiring good to very good level of fitness. The highest sections take place at an altitude of 3500+ meters above sea level, while most of the program takes place above 2500+ meters. The altitude gain is at least 1500 meters and up to 2000+ meters. The ascent speed is 400+ meters/hour.

5. Extreme
Extreme activity lasting several days and requiring a very good level of fitness with regular intensive training. The highest sections take place at an altitude of 4000 meters and above, while most of the program take place above 3000 meters. The altitude gain may be more than 3000 meters, depending on the program's duration. Very good acclimatization and training is required. The ascent speed is 500 meters/hour for lower altitudes and 300 meters/hour for higher altitudes.

0. No requirements/ minimal requirements
Easy rides on comfortable, not so deep powder snow, with gentle run outs and without any steep slopes, no narrow sections and few to none trees and obstacles on the way down. On the way up there are gentle slopes, all no steeper than 30-35 degrees.

1. Beginner
Rides on deep powder snow, or wet spring snow sometimes with thin crust. There are occasional 35 degrees inclines, with some steep sections with well spaced obstacles and enough space to maneuver on the way down. On the way up there are gentle, not too narrow slopes.

2. Intermediate
Tracks with different conditions, including powder snow, as well as crusts and hard packed snow. Multiple sections with inclines of 35 degrees, and narrow sections in dense forests on the way down, but still with clear, fluid lines to follow. On the way up, there are multiple steep sections of 35+ degrees, some narrow and may require crampons and/or other special equipment.

3. Advanced
Rides with a wide range of track conditions, varying from powder to hard packed and wind-blown snow and ice. Multiple sections with inclines of around 35 degrees, narrow couloirs and ridges, dense forests and other obstacles on the way down. On the way up the slopes are quite steep, with some sections over 40 degrees. The use of crampons and special equipment is almost certain.

4. Professional
Multiple varying conditions across the route with large segments of very hard icy snow. Very steep slopes of 55+ degrees, narrow sections, requiring a high level of control on the way down. On the way up inclines are as steep as the snow can hold. Using ski-alpinism techniques is required, including belay.

1. Easy
Light physical activity lasting a few hours and requiring basic fitness level. The absolute altitude is up to 2000 meter above sea level.

2. Moderate
Moderate physical activity lasting from a few hours and up to a full day and requiring basic or above basic fitness level.The absolute altitude is up to 2500-3000 meters above sea level. On such altitudes you may notice some difficulty breathing.

3. Challenging
Challenging physical activity lasting up to two days and requiring a good level of fitness. The absolute altitude is up to 3000-3500 meters above sea level. Activities on such altitude require certain acclimatization.

4. Strenuous
Serious physical activity lasting two days or more and requiring good to very good level of fitness. The highest sections take place at an altitude of 3500+ meters above sea level, while most of the program takes place above 2500+ meters. Good acclimatization is required.

5. Extreme
Extreme activity lasting several days and requiring a very good level of fitness with regular intensive training. The highest sections take place at an altitude of 4000 meters and above, while most of the program take place above 3000 meters. Very good acclimatization and training is required.

0. No requirements/ minimal requirements
Easy rides on comfortable, not so deep powder snow, with gentle run outs and without any steep slopes, no narrow sections and few to none trees and obstacles on the way down.

1. Beginner
Rides on deep powder snow, or wet spring snow sometimes with thin crust. There are occasional 35 degrees inclines, with some steep sections with well spaced obstacles and enough space to maneuver on the way down.

2. Intermediate
Tracks with different conditions, including powder snow, as well as crusts and hard packed snow. Multiple sections with inclines of 35 degrees, and narrow sections in dense forests on the way down, but still with clear, fluid lines to follow.

3. Advanced
Rides with a wide range of track conditions, varying from powder to hard packed and wind-blown snow and ice. Multiple sections with inclines of around 35 degrees, narrow couloirs and ridges, dense forests and other obstacles on the way down.

4. Professional
Multiple varying conditions across the route with large segments of very hard icy snow. Very steep slopes of 55+ degrees, narrow sections, requiring a high level of control on the way down.