Went across cleighorn ridge last weekend . It goes from I-15 at devore to silverwood lake. Its 14 miles long and the main road was passable by high clearance 2wd but 4wd is helpful. The secondary jeep trail which intersects the main road very frequently ranged from moderate to extreme. Moderate is challenging for a stock vehicle extreme meaning stock vehicles will likely have damage and even heavily modified vehicles will need a skilled driver. some sections where extremely steep , uneven, and loose. Lockers and alot of articulation recomended for most sections except a few at the top . the views are pretty good , combined with a VERY easy drive this was a cool day trip . I left orange county at 6 am and was home by noon .

From where i was i could see Pine Mtn road which travels along the next ridge over. Pine mtn is forested where as cleighorn ridge is mostly just brush. I would recomend pine mtn road and skip cleighorn ridge . pine mtn also has a challenging jeep trail paralleling an easy road.