I put 10 Miles for the Trail Length but there is many many more miles that you can do out here. Lots of networked trails. You can take trails to the hill in the middle of the park and walk up the west side of it and on the east side there are two short but awesome DH sections. At the top of the hill there is very good pic to be taken, viewing the Pacific and the lake. also all trails intertwine around the lake. On the plus side, there is a rope swing on the south side of the lake. <br />
From the I-5 in Oceanside, take HWY 78 East. Take the College BLVD exit and go right. At the second stop, hang a left on Lake Drive. Then at the 4th traffic light hang a right at the park (Oak Riparian Park)
http://www.singletracks.com/item.php?c=1&i=3748