Splash Canyon (Red Rock RMX), a remix of the Sonic Riders Theme of Splash Canyon. Red Rock is the name of Knuckles' extreme gear (in this case, a hoverboard).
I loved playing Sonic Riders. My favorite music came from the second level, Splash Canyon. My favorite level was the alternate sunset track, Red Canyon, with Tails and the Grinder gear (hover shoes that enable the player to grind).
Hard to argue with that choice. Not only could he grind, but it looked like he was flying rather than just riding a board.
I'm still waiting on hoverboards to come out, but for now that'll have to do.
Original song "Theme of Splash Canyon" by Tomonori Sawada.