A series of challenges  (8 levels) of increasing difficulty, some parts like cs go surfing.

By French Fries

1. Open C:Program Files (x86)SteamsteamappscommonrocketleagueTAGameCookedPCConsole
2. Backup Park_P file inside
3. Extract ObstacleCourse2.rar, open the map files Folder, rename the ObstacleCourse2.upk file to Park_P.upk and drag all contents into CookedPCConsole
4. Replace all files if asked
5. Open Rocket League
6. Go to freeplay training
7. Play!

alternatively use a program like RLMapLoader to load the map

Do not attempt to play online with this installed, you will be banned for 15 minutes. To uninstall just replace Park_P with your backed up version, or right click Rocket League on Steam > Properties > Local Files > Verify Integrity of Game Cache.

If you want to be able to play online and play this map inbetween games, use the method below
https://www.youtube.com/watch?v=u33bz7FtO0g

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