Paddlers, rafters and swimmers have staged a "Mass Paddle" across Cardiff Bay to the Senedd building.
They want to raise awareness of the access issues that these groups face in trying to pursue their chosen sports.
Lowri Davies, one of the UK's most accomplished freestyle kayakers, was at the event.
She is the 2016 Nile River Festival ladies Freestyle champion, European and four times British Freestyle Champion.
The paddlers claim there can be conflict between different land users or between users and landowners.
The Welsh Government says Wales needs a better and fairer approach to public access for outdoor recreation.