What was the farthest shot taken for a hole-in-one ?

Longest Hole-In-One
Robert Mitera - 447 yrd 10th hole at the aptly named Miracle Hills CG Oct 7 1965

Longest Hole-In-One
Michael J. Crean of Denver, CO- 517 yard par 5 9th hole at the Green Valley Ranch Golf Club on July 4, 2002. - US Golf Register

United States Golf Register™ is the nation's official historical registry of holes-in-one. Our mission is to document and archive holes-in-one, and to distinguish those who have achieved this extraordinary accomplishment. Established in 1998 and headquartered in Shreveport, Louisiana, the U.S. Golf Register™ is the custodial body dedicated to identification, registration, and preservation of holes-in-one made in the United States.

U.S. Golf Register™ is devoted to preserving history with each hole-in-one, and in recording the significance of the achievement as a historical record. There are no registration fees or dues.