The Sikad-Lakad-Takbo, also known as SILAKBO, is a fund raising activity for the Save Silang-Santa Rosa River Foundation, Inc. (S3R2), a non-profit organization and partner of the City Government of Santa Rosa in the protection and rehabilitation of the Sta. Rosa Watershed. Now, powered by The Greentennial Run, SILAKBO HALF MARATHON will be held in a more exciting race venue - Greenfield City!