While riding the Iron King trail recently I noticed riders disappearing behind one of the railroad carts. This looks like a new trail under construction and goes back about 1/2 mile from the iron king before coming to an end at a fence. You can see where the trail continues to go one after this but must not be too much further. The closest trail I can compare this to is Missing Link in the the EP area. This is a technically challenging trail to ride on. Its mostly granite, manzanita and shrub oak throughout.