This area has not been specifically approved for climbing by NJ Parks, and perhaps is completely of partly outside the Park, instead on State-owned land managed by the NJ Dept of Environmental Protection. Also there might be a concern of climbers parking disruptively outside the Route 206 Cranberry Lake commuter parking lot on busy days.
We heard a report that an official survey was performed for a point near this cliff sector, and at least this cliff is very close to the boundary -- like perhaps the top might be inside the Park and the bottom (or middle) might be outside. We do not yet know of any general rule of the DEP forbidding climbing, and as of 2018 this area is not posted for any special status or restrictions. There is no general NJ Parks rule forbidding climbing (after submitting a signed waiver of liability form for the current year).