Castlewood 8-Hour Home Register Updates (12/08/09) Race Info Rules Gear Teams Results Sponsors Volunteers Photos Contact H.Q. Presented by: SPONSORS Sponsors are a very important part of any adventure race. If your company would like to be a part of the Castlewood 8-Hour, please contact Bonk Hard Racing. Thanks! Below is a list of sponsors for the Castlewood 8-Hour adventure race. Please visit their stores and websites often! PRESENTING SPONSOR SERIES SPONSORS RACE SPONSORS ©2005-2010 Bonk Hard Racing, LLC.  All Rights Reserved.