The Twenty: One Woman's Trek Across Corsica on the GR20 Trail

Marianne Bohr and her husband, about to turn sixty, are restless for adventure. They decide on an extended, desolate trek across the French island of Corsica-the GR20, Europe's toughest long-distance footpath-to challenge what it means to grow old. Part travelogue, part buddy story, part memoir, The Twenty is a journey across a rugged island of stunning beauty little known outside Europe.

From a chubby, non-athletic child, Bohr grew into a fit, athletic person with an “I'll show them” attitu...