After scouting around Bernheim a few times, I decided I'd try to make a decent route. This route starts with parking near the Hike & Bike trail head. It has you go out towards the road and then into Bernheim Forest main entrance. It's been my experience that when riding in by bike they do not charge you for entry. You will then ride the paved road to start the Firetower Road all the way up until you get to Wilson Creek Fire Road. You'll take this all the way out to take a LEFT Country Road 1125 where you will do a creek crossing (usually passed without getting wet; if you go right you'll get to a larger creek crossing that is cool to look at but difficult to cross without getting wet unless its pretty dry). Road 1125 turns into Harrison Fork Road that will then take you to the main road 245. The route makes every attempt to take get off 245. A few quick back roads and a short stent on 245 gets you back to the gravel. Once getting to the Ashlock Hollow Fire Road (gravel) you'll ride until you make it to Old Headquarters Fire Road. After approx 1.3 miles you'll come back out to 245. Cross the road and you will find a small paved road that takes you to the Hike and Bike trail. Go Left and it'll take you back to your car. Go right and it goes all the way to the end of the Hike and Bike trail (Approx 2 miles or so plus the 2 miles back to this point). It's worth noting that the gravel trails inside of Bernheim don't say its okay to be ridden by bike but also do not say they specifically cannot. I have passed numerous rangers while riding and they've never said anything to me. Be aware that this route starts by entering the park so that you don't run the risk of the park being closed if you do it in the reverse manner. Call and check when they lock the gates (x1 gate at the entrance and x1 gate at the Fire Tower Road).