Mesa

 is an Advanced Map in Bloons TD 6. It was introduced in the Version 20.0 update, on September 2nd, 2020, along with Etienne.

Overview
Mesa is set in a badlands terrain. Two separated lanes appear on the map, each starting from the left sides of their respective lane. The lanes end towards the right sides of their respective lanes.

Along with complicated lanes, Line of Sight is a highly dominant feature in this map, and it is emphasized further by the amounts of large rocks on the map surrounding the lower valley where all of the top lane appears on top of. There are a few highground spots in the map, including one small flat rock on the middle of the bend of the lower lane, as well as the large plateau at the top left. The one large plateau at the top-left can be used to place large-footprint towers such as Banana Farms or Heli Pilots with little issue.

There are many rough badlands rocks blocking space for placement of towers. Each one of these can be removed for $500 each, and there are 3 of them in total. This provides even more highground space for larger towers to be placed on, such as Super Monkeys or Monkey Villages.

Trivia

 * Mesa is almost the same as the BTD5 Expert Map Death Valley, except the bottom path is longer, the middle part of the bottom lane is close to the middle lane, and there are Line of Sight obstacles.
 * It took only a few hours for Mesa CHIMPS to be beaten and with Black Border. The standard meta Obyn + Bloonjitsu + Double Discount + Sun Avatar strategy plus Perma-Spike was used for the first player to announce beating Mesa CHIMPS on r/btd6.
 * This map is the third new map to debut with Sunshine Serenade as the default map music, the others being Bazaar and Monkey Meadow. Note that Cubism's default map music was Tropical Carnival when it first debuted, and that it plays Sunshine Serenade as of around Version 18.0.