Missing Dirt Race Track

If you look closely at the satellite view, you can see a dirt race track nestled between the trees. It is visible in the explore view on Apple Maps. The track is referred to as "FLAT TRACK CIRCUIT" on the official website: https://www.circuitalcarras.cat/en/

Missing Small Dirt Race Track

There is also this small dirt race track. Look at the note about the large dirt race track for more information.