Microsoft announced today on their Office blog that Microsoft SharePoint 2016 Public Preview has been added to the Microsoft Download Center for everyone to enjoy. You can read Microsoft’s original posting here.
You can download Microsoft SharePoint Server 2016 here.
It should be noted that SharePoint 2016 no longer has SharePoint designer so you won’t find that in the Download Center. I am in the process of making a new environment, so check back for a future post on how to build a SharePoint 2016 development or demonstration environment!