04.08.2014 Community Buy half price Horseradish Festival tickets online By Riverhead News-Review Share on Facebook Facebook Created with Sketch. Share on Twitter Twitter Created with Sketch. Share via email Mail Created with Sketch. Dianne Scott of Riverhead at the 2012 Horseradish Party at Martha Clara. This weekend’s Horseradish Festival in Riverhead has a new look and location from year’s past, and now you can buy tickets for half the price. Visit northforker.com for more information and a link to buy tickets.