SCT is a tight singletrack that winds and twists through the brush. While you don't seem to gain much speed, you have to be on your toes. There is one possible dismount point along the trail.
Watch out for other bikers and hikers from both directions. Starting at Hall Canyon
(vs. Helo Trail
) will save you a steep-er ride up Hall if you do a loop. For IRC Wilderness Access Day at Black Star, this may be the highlight trail for many riders.