French police say the man and 12-year-old boy were exploring a "dangerous, deep, snowy" mountain trail between Bossons and Les Houches.
More top news
Weather throws a wobbly as it's seriously disappointing for summer.
The Bank of England governor has suggested there may soon be a cut in interest rates.
The motorist at the wheel of a self-driving car has died after it crashed with a trailer, the first Autopilot death reported in the US.