This page of the Biomutant guide contains a walkthrough of The Runboard side quest. Here we've described everything you need to do to complete the task and earn rewards.
Starting the quest
How to start: Finding the Runboards.
Reward: 100 XP.
To begin the quest, you must come across one of the Runboards. They are scattered across different parts of the game world.
Location: Leftovers 6I.
You can find this Runboard on the first floor in one of the buildings. The exercise equipment is right next to the hole in the wall.
Location: Fixer Upper 7E.
You'll find this Runboard in the basement of a destroyed building.
Location: Fixer Upper 11F.
You'll find this Runboard in the garage of the destroyed building. You can easily get there by jumping through a hole in the wall.