“A wide dirt and gravel service road connecting both sides of the park.”
— David Gregg
aka: the third "B", the other two being lower and upper Oak Trail
There is a gate, open during the day, at the turn off to Yucca Ridge
, this is the northern boundary of the County Park. I'm not sure who manages the other side.
The crunch of gravel on packed dirt dominates this climbing road. Nothing to write home about, but this trail is the quickest way to the best part of the park, the east side, if you park off the 91 at Anaheim Hills
Elementary School. It's also just a good climbing road if you're into that sort of thing. Look for a detour near the top that takes you to Robbers Roost, a lookout over the whole park.