DS Mario Circuit

Mario Circuit is the third race course of the Star Cup in Mario Kart DS. In the course enemies appear acting as obstacles: Goombas appear crossing the road to and from the sides. By shooting a Green Shell or Red Shell at them, or using a Star, Mushrooms spawn from the Goombas. A pair of Fire Piranha Plants spit fireballs onto the course. The victim will spin out of control when touching one. Regular Piranha Plants, as seen in Mario Kart 64, are also present. This track shares its music and Grand Prix introduction fanfare with Figure-8 Circuit, as well as sharing the latter with Waluigi Pinball and.

This is the first Mario Circuit to appear in the Star Cup since Mario Circuit 4 in Super Mario Kart, and is also the only nitro Mario Circuit to be the third course of a cup.

Mario Circuit returns as a classic course in Mario Kart Tour starting from the 2023 Mario Tour, and as the second course of the Boomerang Cup in Mario Kart 8 Deluxe in the Booster Course Pass.

Mario Kart DS
Characters start out the race near a lake surrounding Peach's Castle. After going through the first corner, Goombas wandering on the middle of the track will try to block the racers' path. After passing by these enemies, characters run along a piece of the lake. Due to that part having no fence, players can fall off into water. Continuing the path, two Fire Piranha Plants located in a S bend will spit fireballs to the course that will cause drivers to spin out on impact. Going through a Warp Pipe-modeled tunnel, the players reach a dirt road after taking a tight turn. The track's dirt section can cause some karts to go off of course, especially on corners. Crossing over the Pipe tunnel, the racers go down on a curly track with Piranha Plants. Past this, characters then continue running over concrete road. After taking a tight S turn, players cross the checked line.

Shortcuts
One can use a Mushroom and go behind one of the Fire Piranha Plants to cut off a turn.

Missions
Missions 5-8 and 7-4 take place on this circuit. In mission 5-8, Luigi has to race one lap on the course against Mario. In mission 7-4, Toad must get rid of 30 Goombas found in a part of the course using Green Shells from the Item Boxes.

Mario Kart Tour
This version of Mario Circuit makes its classic course debut in Mario Kart Tour starting from the 2023 Mario Tour. The course has received many visual improvements since its appearance in Mario Kart DS, as well as many changes in the course. The lake containing Peach's Castle is noticeably smaller and now resembles a simple moat, and the roads on either side are much closer together as a consequence of this. which a small portion of has now been changed into a brief forest section. More elevation has been added to the course, which is mostly noticeable with the S-turn at the end. There is now off-road between the main track and the lake surrounding Peach's Castle. The dirt path continues for a bit longer into the track than in DS. Also, the starting banner now has the modern Mario Kart logo, as well as Mario's emblem on the top.

Mario Kart 8 Deluxe
This version of Mario Circuit appears in Mario Kart 8 Deluxe as part of Wave 4 of the Booster Course Pass. It appears as the second course of the Boomerang Cup. It is the second Mario Circuit course in the pass, after, and the third circuit course in the pass overall, after and. Despite first being announced for Mario Kart 8 Deluxe a day before its Mario Kart Tour announcement, it would debut in Mario Kart Tour before the release of Wave 4, giving this course the distinction of having the shortest gap between classic course appearances, with only a one day gap; beating the previous course with this distinction,, by six days.

The course uses its appearance from Mario Kart Tour, with major visual upgrades. A Wiggler has been added to the forest section of the course. A set of Item Boxes outside Peach's Castle has been moved. There are less flowers outside of Peach's Castle compared to Tour.

In descriptions given by Nintendo for all of the Wave 4 courses, this course was mistakenly described with elements from Mario Circuit from Mario Kart 7, with the course being said to have "blossoming trees" (referring to the cherry blossoms in that course) and taking racers through a winding path into Peach's Castle. The footage does not show a route with "blossoming trees" or a route inside Peach's Castle; instead, a fence is visible in front of the castle entrance, the castle doors are shut, and the castle bridge only comes up to the offroad.

Prefixes left in the game's programming in v2.0.0 indicate that this course was originally the third course of the Fruit Cup.

Mario Kart DS

 * European website bio: "Constructed in the grounds of Princess Peach's famous castle, Mario Circuit is where red-capped plumbers feel most at home. Negotiate the snaking turns while avoiding waddling Goombas, bouncing flames and snapping Piranha Plants, and you might just make it to Peach's place in time for tea."

Mario Kart Tour

 * Mario Kart Tour Twitter: "The Doctor Tour is wrapping up in #MarioKartTour. Next up is the Mario Tour featuring the course DS Mario Circuit, where Goombas and Piranha Plants will try to block your path!"

Mario Kart DS

 * Mario Kart (Trackside banners, banners)
 * Shoot!! (Trackside banners)
 * Super Mario (Trackside banners)
 * Super Star! (Trackside banners)