I've been trying to locate some trails in the Lynnwood, WA area and stumbled across this area, which I'm calling the pit. It looks like a lot of people just dump there trash back here, but hey it's dirt, mud, and an okay place to mountain bike. It's mostly a dirt road, but also has some single track through the trees to keep you on your toes. I've also found a few good drops to practice on also. Enjoy !
How to get there:
Take the 128th ST. exit off of I-5 and head east. Take a left onto 3rd Ave. SE. You'll see an apartment complex on your right and an entrance to the trails staight ahead.