The Blue trail is easily accessible, is great for hiking/biking, and has some great views across the lake.
Here are links to the official park site & to a trail map:
http://www.mercercountyparks.org/parks/mercer-county-park
http://www.jorba.org/sites/default/files/2010_SMART_trail_map_0.jpg
My family just started watching old episodes of Wonder Woman and it's funny to watch her jump really high over things for no apparent reason. When I was placing this one, I thought to myself that she could probably get it with little effort. You, on the other hand, might have to do it the hard way.
If you started at #1 and made it all the way here, congratulations you're almost done. At this point you have a choice to make. If it's been raining recently the Blue Trail might be extremely muddy south of here. If that is the case continue on to MCP BLUE TRAIL #25(a) and follow the street back around to the enterance of the park. If all is dry just get #25 & #25(a) in whatever order you want.
Yeah, you know what you need.
ENJOY!