Here are some links for some extreme kayaking games

Eddy attack

In this game you have to guide your kayak down the river avoiding obstacles.

There are also some play waves to get you extra points and there are lives to help you get as far as possible down the river

Krazy kayaker

In this game you have avoid logs and rocks that are floating down the river.  If you  hit a rock something you have to eskimo roll back up before your breath runs out.

River adventure

In this game you have to guide your kayak down the river avoiding obstacles by using the left and right arrows