KartsNDarts

 is an Intermediate Map in Bloons TD 6, added in Version 8.0.

Overview
KartsNDarts is a race map. The main track starts from the left, underneath the tunnel, around the second loop anticlockwise, around the first loop clockwise, above the tunnel and out through the right exit.

The map features many other features. On the outside, there are two rows of tire stacks on the top and bottom perimeters of the map. On the middle of each of the two loops, there are two haystacks with a bunch of tires, neither of which block the view of any towers via Line of Sight. Once removed, the centres of the loops make perfect spots for towers such as Inferno Ring and The Tack Zone, provided they have sufficient range boosts. The tunnel features an interesting form of protection to the bloons; bloons that are underneath the tunnel are immune to all attacks while inside the tunnel, particularly evident when bloons still remain after using Ground Zero or when bloons do not deal damage-over-time while inside the tunnel (especially from The Bloon Solver). MOAB-class bloons are not protected by the tunnels, however.

Each of these haystacks can be removed for $500 each. Once paid for a haystack to become removed, a obstacle-removal chinook will remove the tires, thereby destroying the haystacks in the process.

Trivia

 * KartsNDarts has been featured in the 9th/10th to 12th/13th February 2019 Race Event after a long Race Events hiatus. The hiatus of Race Events was due to Ninja Kiwi wanting to deal with major game-crash issues first to avoid affected players from missing Race Events.
 * KartsNDarts is the first map to be added to BTD6 since the update where MOAB-class Bloons became 3D.
 * KartsNDarts is considered one of the easiest Intermediate tracks along with Cracked and Streambed.