Johnny van Velthuyzen
- Bridge Over Untroubled Waters, Hopefully In 2015
- Portland Bridge Swim
- A Short List of Marathon Swims
- Olympic Marathon Swims For Amateurs Of All Abilities
- Open Water Swimming
- Daily News of Open Water Swimming
- World Open Water Swimming Association
- International Marathon Swimming Hall of Fame
- Marathon Swimming
- What Is A Marathon Swim?
- Do Marathon Runs Compare To Marathon Swims?
- Longest Marathon Swims In The World
- What is The Defined Distance Of A Marathon Swim?
- How Many Channel Swimmers Are There In The World?
- Bridges Under Untroubled Water, The Portland Bridge Swim
- Oregon Open Water Series Schedule
- Lucky 13 In 2015 Portland Bridge Swim