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Track 4 is a track from the third Bloons TD game, Bloons Tower Defense 3. It is one of the 8 original tracks in the online version of Bloons TD 3. This track was one of the 4 tracks that were initially unlocked. These 4 tracks had to be beaten to unlock the last 4 tracks. This is the hardest of the first four tracks.
This track is what seems to be a river in a snowy area. The entrances are from the far left and the top left. The exits are the top right and the bottom.
- Main article: Track 4 (BTD3)/Strategies
- The MOAB appears to contain rainbow bloons here.
- There was no sound on this track, the cannon will still have it's sound, but once it's upgraded to Missile Launcher, it will not sound also.
- This is the only Bloons TD 3 track to not appear in Bloons TD for iOS or PSN.