Around the world will be held ultramarathon races and racers are linking national parks and nature parks by running, passing through environmentally important areas (areas of exceptional value, especially polluted areas etc.). The race will be held at two levels:

1. There will be a main race - run by an international team of marathon runners, and the route will be determined in a way to include national parks of many countries involved in the project. 
2. It will be held regional races simultaneously in all countries or regions (in the future we seek to held the run on the World Earth Day – April 22nd). 

The routes will be planned in a way that national borders of neighboring countries will be crossed. Regional races are called "Earth Run" and an additional local name. For example, a local race in Croatia is called "Earth Run - Race of Croatian national parks."

Planet Earth will organize a main race and will coordinate the maintenance of regional races. Planet Earth ensures a sufficient number of uniform shirts for runners of all participating countries as well as other joint promotional material. For organizing local races, Earth Run organizers will find a partner organization or institution.

Logical development of the race is to be on one ultra-long route; the race is held in the form of competition in several categories, such as single and team (relay).