Yes it sounds like you were on Pierson. We will not get to that section until next year.
Technically, the crossover (white trail) runs from Sloatsburg Rd (by RW Manor) all the way to Bear Swamp. Much of it is hike a bike or eroded fire road, so we (JORBA) with cooperation of the hiker group and State Park, are building sustainable re-routes.
The section just completed, runs from the race course loop below Webly Pond down towards where it crosses Whites Rd. It will not be blazed until all 5 sections are complete. If you hop onto the race course by Webly, you should find it.