Nice and wide trails to take a family walk on, plus a playground at the TrailHead. Be aware they are generally multi-use trails and that you may cross paths with horses, bikes, runners, etc...
Please don't ride when muddy.
From the southern tip of the Mann Loop trail, keep heading south along the river bluff. The trail is somewhat wide and very flowy. It's easy to keep speed here, but be careful, the soil can be very loose with sand/gravel in spots.
Also, watch out for hikers, horses, and uphill riders. This is a two-way trail, though the preferred riding direction is downhill.