The CDC / WHO recommended safe physical distance is (roughly) equal to:
Based on current guidelines of 6 feet. Follow media for updates. If this varies, try the site's general length calculator.
Reminder: This is the minimum distance you should keep from others if you are compelled to go out!
If you can, please stay home, stay safe, stay healthy.
Please keep this distance even if you don't consider yourself to be in a high-risk group; you can still spread the disease even if you have no symptoms and you won't know the status of those around you.
Thanks to America's National Parks and the Boston City Government for some of the newer units.