Annual Yukon Quest participant

• Iditarod participant
• Part of an ice pack?
• Iditarod toiler
• London hauler?
• Tower over the snow
• Iditarod sight
• Part of a northern team
• Husky, for example
• Malamute, for one

Wiktionary Word definitions in Wiktionary
n. (alternative spelling of sled dog English)