Ключевые слова: active, activity, athlete, backcountry, cloudy, competition, country, cross, crosscountry, crosscountry skiing, czech, czechia, day, exercise, fitness, forest, fresh, healthy, jizera, jizerky, jizerske, landscape, light, man, nature, nordic, north, people, scandinavia, season, ski, skier, snow, sport, sun, sunlight, sunny, sunset, top, tourism, track, trail, training, tree, trees, two, vacation, wilderness, winter,