This will come with natural play in the game, as it counts every step you take as 1m on any surface.
HELPFUL TIPS
1. Create a level area to run on. You can make it out of any material or dig a tunnel 3 spaces high. You can also have it go up/down one block and still be able to run on it.
2. Equip some boots to increase your running speed: Hermes boots for low level, Lightning or Frostspark Boots if duping.
3. Fastest material to run on is Asphalt Blocks, which are made of out Gel and Stone Blocks in a Solidifier (sold by Steampunker). These increase your running speed if you want to build a "road" out of them.
4. To keep track of distance, you can use a GPS to find out how long your pathway is or how far you are travelling if trying to boost this or check the Leaderboards.