That's news to me? Getting out of lava to the trails can be all over the spectrum. They are constantly working at making it easier to get in anD out of. For the most part I ride the side of the road up to the road/trail that goes to Brookes lake lodge area. Then the trails are only used as a way point from there.
Must have been a rumor about lava then. I've stayed there in the past when Jardine owned it. The trail went right out the back door and was ungroomed about half way. Had been at Mckenzie Ranch last few times I was there. Group I ride with have a house rented from? Pinnacle Properties ? in the Lava Mtn area. Lots of 30 mile - 10 hr days of riding there.