Skiing
Ski Mountaineering Training Guide: Skimo Racing and Ascent
How to train for ski mountaineering (skimo) races — skinning technique, transition speed, downhill skiing fitness, and gear for uphill-downhill racing.
The skimo format
Ski mountaineering racing (skimo) is a format that combines uphill climbing on skis with skins (adhesive strips attached to the ski base for grip) and downhill skiing on the same skis. Races range from sprint events (a single climb and descent of 4 to 6 minutes) to individual races (multiple climbs and descents of 1 to 3 hours) to team relay and vertical-only events. The sport demands cardiovascular fitness for the uphill, ski technique for the downhill, and transition speed (removing skins for the descent and reapplying them for the next climb).
Skimo is one of the most aerobically demanding endurance sports. The uphill portions are run at or near threshold, and the transitions — removing skins, putting them back on, switching between walk and ski modes on bindings — are timed and can decide races. The sport has grown rapidly and is now a World Cup and World Championship discipline. Browse skiing races to find skimo events, and consider a local skimo series as an entry point.
Skinning technique and uphill fitness
Skinning — climbing on skis with skins attached — is the core skill of skimo. The technique uses a sliding walk: plant the ski, push with the poles, and slide the other ski forward. On steep terrain, the technique shifts to a herringbone (skis in a V, edges biting the snow) or a kick turn (pivoting 180 degrees on a steep slope). Efficient skinning uses the glute and hamstring muscles, not just the quads, and a smooth, rhythmic pace is faster than a hard, jerky effort.
Uphill fitness is built through a combination of skimo-specific training and cross-training. In the winter, train on skis: long skinning sessions for endurance, and short, hard skinning intervals for threshold power. In the summer, when snow is unavailable, train with trail running, hiking with a heavy pack, and cycling. The cardiovascular engine of skimo is similar to trail running, so summer trail running fitness transfers well. Use the race calendar to find a skimo race and map your training to the winter season.
Transitions: the fourth discipline
Transitions are where skimo races are won and lost. A typical race has multiple transitions: removing skins for a descent, reapplying them for the next climb, and switching bindings between walk and ski modes. A smooth transition takes 30 to 60 seconds; a fumbled transition can take 2 to 3 minutes. Over a race with six transitions, the difference is significant.
Practice transitions until they are automatic. The key transitions are: removing skins (peel the skin from the ski, fold it, and stow it in your jacket or pack), reapplying skins (attach the skin to the ski base smoothly, ensuring full adhesion), and switching binding modes (walk mode for climbing, ski mode for descending). Set up a transition practice area on a gentle slope and time yourself. A competitive skimo racer can complete a full transition (skin removal or application) in under 30 seconds. Save your target skimo race to My Season so the countdown keeps your training on track.
Downhill skiing in a race context
The downhill portions of a skimo race are not casual descents — they are timed and raced. The challenge is that you are descending on lightweight skimo skis, which are shorter and lighter than standard alpine skis, with boots that are lighter and less supportive. The technique is similar to alpine skiing but adapted to the lighter equipment: make shorter, quicker turns and stay centered over the skis.
If you are new to skiing, the downhill is the steepest learning curve. Before racing skimo, be a confident alpine or backcountry skier — the downhill skills are prerequisite. If you are an experienced skier, practice on your skimo gear to adapt to the lighter, less supportive equipment. In a race, the descent is where less experienced skiers lose the most time, so invest in downhill practice. Browse skiing races and check the race format and expected conditions before registering.
Gear for skimo racing
Skimo gear is highly specialized. A skimo race setup includes lightweight skis (under 1 kg per pair for elite racers), skimo-specific boots (lighter and with a walk mode), race bindings (lighter than alpine bindings), and skins (mohair or synthetic, cut to fit the ski). A helmet is mandatory, and many races require an avalanche transceiver, shovel, and probe for backcountry events. The gear is expensive but lighter gear is faster — every gram counts on the uphill.
If you are new to skimo, you do not need a full race setup. Start with backcountry touring gear (heavier but more versatile) and enter a beginner or citizen category race. As you progress, invest in lighter gear. The sport is welcoming to newcomers — most skimo series have a recreational category that is less demanding than the elite race. For your first skimo event, choose a local sprint or individual race with a single climb and descent. The cross-country skiing training guide covers the Nordic side of the sport.