Courtesy of Open Water Asia, Hong Kong.

The 9th annual Clean Half Extreme Marathon Swim will be held on October 10th in Hong Kong.

The course offers 15 km of waves and wind. The event is primarily a 5-person relay event, but it is also open to soloists in for a challenge that must be accomplished within 6 hours.

For more information and registration, visit www.openwaterasia.com.

Copyright © 2015 by World Open Water Swimming Association