This is the widest trail but gives you access to all kinds of fun and twisty single trek trails. I took one called Sidewinder that challenged my balance and coordination as descended and ascended through narrow but thrilling spaces between oak trees. This network of trails is clearly marked and accessible from many areas. The area is shared by hikers and joggers as well as bikers. Ditch trail itself seemed about 2 miles in length but ends at another large network of trails: Miners Trail etc. If you want a longer ride the trails go on for miles and miles beyond.
Access behind baymont inn near south Yreka exit. Go up the hill and hang a right at a trail that takes you to the water tower and well marked trail called Ditch Trail.
http://www.singletracks.com/item.php?c=1&i=7236