Marsh-Billings-Rockefeller National Historical Park Establishment Amendments Act of 2010 - Amends the Marsh-Billings-Rockefeller National Historical Park Establishment Act to expand the boundary of the Marsh-Billings-Rockefeller National Historical Park in Vermont to include the King Farm in Woodstock, Vermont.
Requires King Farm to be added to, and administered as part of, the Park and to be used for agricultural, forestry, conservation, and educational purposes.