When you look up a hike in one of the many popular books on the subject or you find a good reference on the Internet (for example, http://www.toddshikingguide.com), keep in mind that if you are over 40 and have not regularly worked out for at least a year of two, you should choose the easiest (and shortest) trails. And irregardless of your age (you might be 18 or 52), your best estimate of the time it will take to complete a hike is to double the times reported in the various paper and online publications, because it seems that many of these top-notch hikers and outdoors writers treat their outings as workouts, and push hard, and do not often stop to enjoy the views and the endless allure of nature in the wild.