Possible Clues:

• Having more pitfalls
• Following run on icy surface winter sports enthusiast is more reckless
• Alpine enthusiast after run, one more perilous
• Such could be runs by one sporty type going off-piste?
• Less secure
• More chancy
• More likely to cause damage or loss
• More hazardous trail regularly taken by winter sportsperson
• It's more dangerous for one who could do with a lift after run?
• Runs one sportsman finds more dangerous