You can't play this circuit initially since you need to met certain requierements for each of the 4 tracks of this circuit.
It's consists of 4 Maps
1. Ando Prime Centrum - Complete Amateur Podracing Circuit, scoring first place in all tracks.
Winning first place in this track will unlock
2. Abyss - Complete Semi-Pro Podracing Circuit , scoring first place in all tracks.
Complete Semi-Pro Podracing Circuit
Winning first place in this track will unlock
3. The Gauntlet - Complete Galactic Podracing Circuit, scoring first place in all tracks.
4. Inferno - Complete the first 3 tracks of this circuit, scoring first place in all tracks.
Just play naturally through the course, aiming to get first place on every map, if you are in trouble, try playing with a different character/pod racer.
Reminder:
There's game commands to unlock everything in the game, check the following solution