Slides used for the orientation of the 4th Olango Challenge. An event by Philippine Business for Social Progress and the Philippine Aquatic Sports Association. Held on April 30, 2011, Tambuli East in Mactan, Cebu.

1. 4 th Olango Challenge Swim for Nature, Swim for the Future Open Water Marathon Swimming Event to Benefit Olango Island

3. In Support of Olango Island

5. 1 st Olango Challenge

6. 2 nd Olango Challenge

7. 3 rd Olango Challenge

8. Race Route

17. Race Route

18. Tambuli

19. Tambuli

20. Tambuli

21. Crimson

22. Crimson

23. Crimson