India, Dec. 21 -- From vineyard strolls to countryside jaunts, Europe is absolutely loaded with hiking destinations. Out of all the places to go hiking across the continent, islands are among the most memorable, offering dreamy seaside views along coastlines and through interior forests and mountains. But some, of course, are more striking than others. Island Hopping, a family-owned tour company that specializes in Greek island travel, recently conducted a study to find the best of the best.

For the survey, each island's trail offerings were assessed in terms of quality and quantity. To determine quality, for example, average trail length, safety, climate conditions, and accessibility were all considered. Certain travel metrics were also...