Register now for the Hancock County 4-H June Jamboree at the Blue Hill Fairgrounds from June 17-19! 4-H June Jamboree is an annual event hosted by Hancock County 4-H. It is open to ALL 4-H members, friends, and family in Hancock, Penobscot, Piscataquis, Waldo, and Washington Counties. June Jamboree features a weekend of hands-on workshops read more 4-H June Jamboree – Register Now!