I'm not a huge fan of this separate park area from Sunset Park- though this part has a shaded playground area for kids and informative dessert plant-and-wildlife plaques to educate readers, it has far less to offer than the larger portion of the park. On the plus side, this area is less trafficked so you can keep to yourself a bit better.
I attended a 5K here that was poorly organized (though that doesn't reflect on the park itself) and did not enjoy the dusty looped trails in this area- the sandy hills provide an interesting traction and the dead desert plants were a sad scenery. The natural aquifer has some wetlands areas that seemed to contribute to a murky, humid atmosphere in the area.