This is a fun trail that drops down to Butcher Trail. It is part of the annual Downieville Classic Cross Country Race. It starts as a doubletrack but quickly becomes singletrack as it plunges steeply into the valley. There are some challenging rocky sections near the start of the steep descent.
You then come to sections with cinder blocks set into the dirt for stabilization. The trail continues steeply down to the bridge and then becomes a nice rolling singletrack all the way to Butcher Trail.
From here, right will take you down to Downieville, and left will take you up to Packer Saddle.