Quarry ridge is on a small area about .75 mile by 500 yards. There's a 4 major trails running length wise, (Lake side, Dizzy, Bottoms Up, and Rewind.) Plus Sandy Climb at the NE end conecting all 4and low to high. Runing cross wise (and therefor top to bottom) there are several expert/DH trails. (Three Sisters, Tunnel, and Sandy bowl.)
Us 18/151 to Fitchburg to <br /><br />McKee Rd (SW of Madison 1.5 miles from 12 free way) Go W then S on Fitchrona rd. (B4 supper Target) Keep going pst under pass to parking on Left. trail starts in woods South of the field and lake. There's a track S from parking, down the blvd, leading in. Or follow the paved path to the gravel road past the lake to start Sandy Climb.
http://www.singletracks.com/item.php?c=1&i=8839