Tucson lies in a saguaro-studded desert basin surrounded by four mountain ranges and book-ended by two national parks. In an hour you can drive from an arid canyon in the Arizona-Sonora desert to a pine-forested mountain at 9000 feet. Hiking trails are plentiful and as varied as the terrain. Five-Star Trails: Tucson by Rob Rachowiecki guides hikers to diverse trails suitable for anyone from wheelchair-using nature lovers to those looking for...