All i can say is WOW! I saddled our mountain bikes to the car and headed out to explore the trails out here. IMHO its probably the best place in the valley to take your mountain bike.
The trails were clearly marked and well established. We only had enough time to do a loop around the backside of the mountain but i can tell you the scenary of the back country is amazing!
I come to Red Rock canyon every weekend to bike, hike and explore and i am never disappointed. On the downhill, i was really flying and caught air more than a few times which reminded me of myself as a teenager racing BMX! Fun times i tell ya!
If you have a mountain bike collecting dust in your garage, load it up and head to Late Night Trailhead. You will be glad you did. The best part? Its free!!! ( insert applause here ) Now is the best time to do it since the temps are in the 80's. If you wait much longer, it will be very hot necessitating a very early a.m. ride.
Bring a back pack, sun block, water, snacks, the usual stuff, especially a camera. Its literally a photo safari back here. AAA +++