The off-piste terrain was rugged and unpredictable.
off-piste route
Frequency:
45
%
They followed a challenging off-piste route through the mountains.
Idiomatic Expressions for off-piste
Phrase: Off-piste skiing
Meaning: Skiing on unmarked, ungroomed, or unpatrolled slopes
Usage: He is an experienced skier who enjoys the challenge of off-piste skiing.