Roller Coaster is a trail that goes right from Upper Park / Lower Keystone.
It is intersected by the Peanut Trail from the right so you can access the lower section of the trail from Red Lady Express.
You can also use a traverse through the woods on the right at the top of the Roller Coaster trail to access Upper Smith Hill and Tulsa if you started from the Silver Queen Express or Paradise Express.
As you ski down Roller Coaster you'll find some fun poppy rollers as the trail merges back into Lower Keystone as Red Lady Express passes overhead.
You can bear right if you want to head to Lower Smith Hill and Painter Boy Lift.