Climb to the top of the Buttertubs pass from the North; #49 in Simon Warren's Official 100 climbs. 240m/790 feet of climbing in 3.9Km/2.4 miles. Have a nice day.
Don't have FulGaz already?
Download FulGaz now and ride Buttertubs from the North (OC-49) on your home trainer. You'll then feel every change in gradient and see every turn in up to 1080p video.