June 11, 2015
First, these trails are better referred to as Dutch Hollow.
Took 1 day to ride these trails when in PC recently. The network is very good, in my opinion.
We rode the Cottontail/Sage/Aquaduct/Barrell loop first. (The lower Barrel is a very fun trail at the bottom, definitely ride the "rollercoaster" south/downhill.)
Then road up Dutchman and broke a derailleur hanger, and had to get that repaired. Came back and road up Donkey Ridge to Prospector and back. Very nice downhill.
Here are some very good links for more info:
A key Park City interactive map is at:
Has more detailed gps tracked trails and difficulty color ratings.