Have you ever tried cross-country skiing?  I compete in the sport, there are actually quite a few formats for it.
I have actually never been skiing before but it sounds fun! What types of formats are there?
Well, for one thing there are races that happen on groomed tracks, and then there are freestyle events. 
Typically, how long are races? And how many people compete?
There are many different group sizes and lengths of races. There are even cross-country ski marathon events that are sanctioned by an organization called the Worldloppet Ski Federation. 
A ski marathon sounds intense. I've run a marathon before but skiing one sounds like a whole different beast. Have you ever done a ski marathon?
(in-track) and freestyle events, where the skiers may employ skate skiing. It also encompasses cross-country ski marathon events, sanctioned by the Worldloppet Ski Federation, and cross-country ski orienteering events, sanctioned by the International Orienteering Federation. Related forms of competition are biathlon, where competitors race on cross-country skis and stop to shoot at targets with rifles, and paralympic cross-country skiing that allows athletes with disabilities to compete at cross-country skiing with adaptive equipment.
Norwegian army units were
with a ski run and cross-country skiing trails, which are often not groomed, but are nonetheless gridlocked. When the snowfalls come in winter, the winter sport area is opened. On the only ski run can be found one of the Odenwald’s few skilifts. It is 450 m long and reaches 540 m above sea level. Moreover, there are a smaller lift on the slope’s lower reaches, a snowmaking facility, floodlights and a snow grooming vehicle. The heights have a state-championship-