Nice peaceful walk along a well maintained trail.  We were the only hikers on a Friday morning.  Parking for a handful of cars available at the trail head which is located next to a restroom.  Easy to find.  

I found the hike description to be misleading.  The distance from Rock Creek Horse Camp to Hidden Falls was a little more than four miles, not three as stated.  Also there were many steep sections and there were places that were definitely not kid friendly - contrary to the description.  I would put this trail in the challenging category, it is quite strenuous, uphill to the Falls from the trailhead.