Is the Hammond Castle open year round. Am planning a trip to the area the end of May, beg. of June 2009. Thanks,
Have a look at their home page:
It says: "We anticipate re-opening mid April 2009." For detailed info you could also contact them directly via phone: 978-283-7673 or use the home page's contact form.
They'll be open by then, a lot of the local schools go there for field trips towards the end of the school year.