The Kickham Ranch office at Henry Coe State Park, a few miles SE of Hunting Hollow, gets very few visitors. I was there twice before, without really knowing if I was supposed to be there or not. I decided to visit again on a muddy and short bicycle loop into the park.
The signs have changed a bit, but it appears to be OK to use, though not officially publicized or encouraged as an entrance. http://coepark.net/pineridgeassociation/planning-your-visit/visitor-centers-and-park-entrances There are no discouraging signs, but there is one gate to hop over if you want to connect to the Hunting Hollow Trail.
I parked my car on Jamieson Road, a bit before Kickham Ranch, and unloaded the mountain bike. A State Park truck passed me and waved before I headed out. Kickham Ranch is actively used by park staff, and I think I’ve heard that one Ranger may live there.
I stopped in to say hello to the bear, and headed back out.
Shortly after passing the Canada de Los Osos pond, the road got a bit steeper and I encountered some VERY sticky mud. I was later told it had been recently graded, which ruined the normal hard pack surface.
I struggled to push or carry the bike uphill for a few hundred feet, while my feet slid in the opposite direction. Finally I got to the top of the hill and everything got better…slowly…as I poked at the mud with a stick and used some water from the closest trough.
This is a standard ranch gate, without any way around it. You, and your bicycle, must go up and over the 5 foot height.
No more sticky mud was encountered. The creek crossings had a few stagnant puddles, but no flowing water. I did get splashed and muddy, however (in a fun way, knowing I had clean clothes in the car!)
Hunting Hollow was quiet. This car had been there for awhile, but not overnight, judging by the small amount of warmth coming from the engine. I did not see anybody in the park, and only two vehicles on Canada and Jamieson Roads.
Head down Gilroy Hot Springs Road, and turn left at the Fire Station.
That’s it! It was about 11 miles and ~600 vertical feet. An interesting outing, but also a good reminder as to why the single track trails are closed to bicycles after a rainfall. Yuck! (Map & GPS track on Strava: https://www.strava.com/activities/448395470 )