blizzard

• a blizzard is a snowstorm with strong winds.

courageous

• brave; fearless

checkpoint

• a place along a route where people sign in

experienced

• having the knowledge to do a task

musher

• The driver of a dogsled team

rugged

• having a rough, uneven surface

vowed

• promised

volunteer

• someone who helps free of charge

whiteout

• heavy clouds over snow that lead to completely white conditions that make it impossible to see

refuge

• a safe or covered place out of bad weather

burrowed

• dug a hole like a small animal

squinted

• looked with eyes partly open

remote

• distant; far from cities or towns

purebred

• animals coming from many generations of the same breed or kind

trailhead

• a place where a trail begins