The goal, when they started, was to hike the Tour du Mont Blanc in France, a challenging trek of about 100 miles around the flanks of Western Europe’s highest peak. Neither he nor she had fully retired, but they had started the process of cutting back. Three kids were grown and out of the house. There was time to entertain the prospect of an experience far different from day-to-day lives as professionals and parents. The adventure, a 2012 REI-led outing in the spring, provide