The Blair Witch trail by itself is 1.4 miles.
Some of the finest singletrack in Summit County.
This loop combines singletrack, double track rec. path- and ok- a little road into a loop around Dillon Reservoir. I usually start the ride from Keystone but you can start just about anywhere. The basic route is: Aqueduct>Blair Witch>Colorado Trail>Peaks Trail>Rec. Path>Old Dillon Reservoir>Oro Grande. For more mileage you can add Frey Gulch and West Ridge.