Sunset Slalom is a racetrack that runs through caverns full of icicles and mounds of snow. The roads are very slippery and must only be attempted by seasoned drivers. The track is famous duing sunset when the ice glitters as the sun sets. The racetrack can be found in Snowy Mountain. Driving through some snow mounds or icicles give you F-Energy Crystals.
The hidden blueprint is above the first lake in the icy caves. You'll need to boost and jump to grab it.