Family Friendly: If they go slow, they will be have a lot of fun, even with hardtail bikes.
The Chowchilla Trail is a very nice way to finish Devils Peak Ride (Signal Peak Lookout Tower)
. It's an old dirt bike road that's wide enough for speed up and make it fast if you want to make it fast.
I recommend going all the way to the top of Devil's Peak Summit Road #4S31
to get amazing views (it's a great work out) and on your way back take this trail and you'll be done for the day.
You start from the fire road that goes to Devil's Peak Summit Road #4S31
and you'll follow down the fire road in that corner and after passing a granite dome on your right a little bit down the road you'll see a dirt bike trail sign to the right. From there enjoy fun jumps, turns, bends and rocky sections, and nice surrounding meadows.