If you want to stop on a dirtboard you can one of two things:

• Use a hand break system


• Powerslide

Most mountainboarders choose to powerslide as break systems just take away from the mountainboarding experience.

If you are new to mountainboardin heres an example of a well executed powerslide:

Nice idea for a post.   Heres a mountainboarder powersliding to slow himself down:

Here's another video of someone powersliding to slow down on a mountainboard.

cheers for powersliding, its fun.