There is no shortage of hiking trails in the National Parks.  There are more than 21,000 miles of hiking trail spread across 419 National Park Service Units.  Some hikes are short boardwalks and others are long-distance hiking trails   There is a park and trail for every hiking skill level.  Not every hiker wants to head into the wilderness and spend the night.  So I asked a few of my fellow travel bloggers and national park lovers to share their favorite National Park Day Hike to create a giant bucket list of days hikes for you to explore. Each of these hikes is between 5-18 miles long and takes between 3-12…