This is my alltime favourite, the game that I made my first tracks for.

I've always been a fan of tri racing sims because they allow you to make your own tracks, even 100% custom if you want to do so.
Click on the menu left to get a discription of the tracks I made for this game

Feel free to use all my models and/or textures from my tracks, all you need to do is give me credit for them in your readme.