The entire trail network is family friendly.
With no markers at either end, this trail is in the La Tierra boonies (if that's even possible). This a popular approach to the Hustle & Flow trail as it is challenging (by La Tierra standards) and serves as a good warm up.
It starts a ways north of marker 11 at a crossroads where you can choose from three directions. Pick the middle direction north, and you're off. The trail dips into a valley three separate times and climbs back out all three times. The trail is more technical than most trails in La Tierra. That said, it shouldn't pose a problem for most riders.