There are a lot of good bridges over the Passaic River so that shouldn't be your issue. One or two have metal grates, but also sidewalks, and there are lots of others.
If you've made it to Lodi, then all you need to do is continue north on Rochelle Ave. and you can get to Bergen County's best riding.
Too, you can easily get to Montclair which has good riding, and group rides out of the Montclaire Bikery, and you can continue on to Garrett Mountain. I'll try to make you a map.
Last edited by zowie; 10-21-13 at 02:49 PM.