noun, masculine/pɛ̃.tat.lɔ̃ de nɛʒ/plural: pentathlons des neiges
pentathlon des neiges is masculine in French.
snow pentathlon (a five-leg five-sport race involving vélo (“bicycling”), course (“running”), ski de fond (“cross-country skiing”), patin (“ice skating”), raquette (“snowshoeing”).)