From the Clean Olle Facebook group:

The third “Clean Olle” event of 2013 will be tidying up Course 14 in the southwest of the island. Come along, help out, and enjoy the day.

When: March 9.
Where: Course 14 start point (Jeoji Community Center).
Time: 10 a.m.

*For more information click here to leave a message on the Clean Olle Facebook group and they’ll get back to you in English.

Map of Course 14 (Jeoji – Hallim)

Official Jeju Olle Web Site