two major trail heads, birch st(WF park) and Galby lane(Samish way/padden), the birch or north side is the more xc/singletrack entrance, galby lane/south side is a road you climb with some xc loops but most people just push/pedal up the road, i like singletrack more than fireroads myself but it is quicker to the towers on the galby lane side, you'll have to look at some trail maps of galby to really see.
there are afew other entrances but they exit at random places in neighborhoods
there are afew other entrances but they exit at random places in neighborhoods