Crystal Glide is a short cruiser run that links you between two zones.
The run starts off Zig Zag and is marked as a way to get to the bottom of the Crystal Ridge Express.
Continuing down Zig Zag will take you to the lower mountain and the base of the Excelerator Express.
If you are looking to get to the base of the Crystal Ridge Express instead, Crystal Glide is a short and uneventful run that links you back up with Rock 'N' Roll which will take you where you are looking to go.
Look for signage off of Zig Zag which will direct you here.