Intro to Left Hand OHV
https://www.trailforks.com/route/intro-to-lhohv/.
From the Buckingham Park trailhead or wherever you parked along the road, head west on Lefthand Canyon Drive. Look for Lefthand Main #286 on your right. This trail starts out steep... and don't expect anything else from this ride.
From the entrance, continue left onto this trail system's main fire road, Lefthand Main #286. The road climbs gradually, the best chance you'll have at a warm-up. At the top, you'll reach the intersection called Five Points. Turn right on Fireman Hill 286D and get ready for a heart attack inducing climb. In the middle of one of the switchbacks on the road, you'll hit an intersection with Saddle West #841 and make a right. Then continue on to Saddle East #842 for a rowdy fun descent.