Average ratings are based on the published values and not the values entered in your own log entries.
As you enter the park, bear to the left to get to the trail head. You have to drive all the way to the back of the park and there is a small parking lot here for trail use.
Also be sure to check out the fruit and nut trees on the left right after the entrance to the park that the city has planted. There is a descriptive poster and each individual tree is labeled.