SNES Ghost Valley 1

Ghost Valley 1 is the third course of the Mushroom Cup in Super Mario Kart. It is an old bridge surrounded by Boos. The course returns as the third course of the Extra Mushroom Cup in Mario Kart: Super Circuit, and in Mario Kart Tour where it first appeared in the 2019 Halloween Tour. It is also the first ghost-related course in the Mario Kart series, and is also the first course set in a dark environment on a dilapidated pier-like road surrounded by Boos, a theme that future tracks follow, namely Banshee Boardwalk in Mario Kart 64 and Boo Lake and Broken Pier in Mario Kart: Super Circuit.

The music for this course (and subsequent Ghost Valley courses) is a sped-up remix of the music that plays in the Ghost Houses in Super Mario World. Part of this music is also remixed and played on Banshee Boardwalk, Boo Lake, and Broken Pier.

Course layout
The course has limited guard edges, but bumping into a tile at the edge of the bridge will destroy it, allowing players to go through and fall off the course. There are several jump pads on the track, the last one allowing drivers to cross a gap. Two other lines are placed directly before two ? Panels which makes those only reachable by driving back or jumping over them with a Feather or a well-timed hop. There are some planks near the end that act as a shortcut, which can only be accessed with a Feather, Mushroom (boosting off the jump pad before it), or a well-timed hop (only applicable in 150cc).

Mario Kart: Super Circuit
Ghost Valley 1 reappeared in Mario Kart: Super Circuit, and is the third track of the Extra Mushroom Cup. It uses the background from Boo Lake. It is relatively the same as its SNES counterpart, although the two small bouncy pads before the two lone item boxes and the legs holding the track up are removed.

Mario Kart Tour
Ghost Valley 1 reappears in Mario Kart Tour, starting with the 2019 Halloween Tour, alongside DS Luigi's Mansion and DS Waluigi Pinball. It is one of the five Super Mario Kart courses in the game to have not previously appeared as a retro course since Mario Kart: Super Circuit, the other four being Vanilla Lake 1, Choco Island 1, Donut Plains 2, and Vanilla Lake 2. The background appears to be less dark compared to its original appearance, allowing visibility of mountains, dead trees and an entire lake surrounding the track. The newly-added starting banner, which uses the classic Mario Kart logo, is held up by two light posts. While the Item Boxes behind the two short jump pads are absent, an extra set of Item Boxes are added on the jump pad before them. The jump pad, gap, and 90° turn near the shortcut were moved back, and the straight following said turn is wider. The shortcut itself is blocked by a cutout of Boos, which hides a jump pad behind it. Additionally, the smoother turn at the end of the shortcut is wider. Unlike the original, guard edges are not destroyed after bumping into them, and there are more present on the insides of the smoother 90° turns, the second of which was made sharp. This course is a favorite of Luigi, Pink Shy Guy, Rosalina (Halloween), Peach (Halloween), Fire Rosalina, King Boo (Luigi's Mansion), Pink Shy Guy (Ninja), and the Mario Mii Racing Suit. It is also a favorite of Black Yoshi and Dry Bones (Gold) if they are at level 6. Beside Ghost Valley 1, the 2019 Halloween Tour introduced additional reversed and trick versions of the course, titled Ghost Valley 1R and Ghost Valley 1T respectively, with the Valentine's Tour later adding a reversed/trick version, Ghost Valley 1R/T.

While many retro courses in Mario Kart Tour use their original music, this course uses the Mario Kart Wii arrangement, which is shared with SNES Ghost Valley 2.

For this course's tour appearances, see List of SNES Ghost Valley 1 tour appearances in Mario Kart Tour.