this is a unique event since it is in the evening and you get to take home a watermelon after the race and they often have prizes for age group winners like running socks.
only negatives are the race always starts late (considering evening traffic maybe thats a good thing) and the $7 parking fee to get in to el dorado park hurts but you can park a short jog (less than half a mile) away if you go on wardlow in either direction (i think to the west is closer) and park in the neighborhood.
course loops around the park which is flat and fast, good bird watching too.
if you bring the family, there is a huge playground for the kids to play at. great event and usually some fast times from local HS & college cross country runners