| A | B |
|---|
| blizzard | A snowstorm with strong wind |
| checkpoint | place along a route where racers must sign in |
| courageous | fearless, brave |
| experienced | familiar with a task because of having done it before |
| musher | the driver of a dogsled team |
| rugged | having a rough, uneven surface |
| burrowed | dug a hole as a small animal would |
| refuge | a place of shelter or protection |
| vowed | promised |
| descent | downward step or slope |
| remote | distant, far from towns or cities |
| discard | to get rid of as useless or unwanted |
| layover | brief stop on a trip |
| squinted | looked with eyes partly closed |
