FATMAP difficulty grade
By combining Whiskey Shots and Whiskey with parts of Caples Crest, riders can easily stitch together an advanced-level top-to-bottom run through the Kirkwood Bike Park.
While the run does begin on the doubletrack Caples Crest, it quickly switches to singletrack on the intermediate-rated Whiskey Shots.
Finally, the finish on Whiskey is rated as an advanced-level black diamond trail by Kirkwood. Sources: https://www.kirkwood.com/explore-the-resort/activities-and-events/summer-activities/mountain-biking.aspx