Let me start off by saying I wish someone would GPS this trail. You can get lost in Fox Park quite easily (I do all the time), so give yourself a big window of time. Also, please don't pay too much attention to the trail length I gave. I honestly can't tell you how far back this goes.
This place has a good bit of variety, but it is mostly rocky/root-y single track that you'll be crawling up or flying down. There are some features mixed into the trails. A large 15+ foot log with the top hacked flat crosses a stream, a rather arbitrary boardwalk which reaches about 10 feet tall x 30 feet long you can ride down through the pine trees, and a dirt jump section which includes a few smaller jumps, an inclined log, some random log I think you're supposed to hop onto, and the coolest thing, a 3 foot high jump which throws you onto a steep decline at the bottom of which begins a 20 foot boardwalk/ramp that ends with a 6 - 7 foot gap. I ate dirt my first and only time, and my shin's still numb from where I banged it on the ground. So, Fox Park definitely has some cool stuff and it needs to really be explored! A lot of stream crossings could be cause for some more bridges, because I find myself walking across more than riding through.
The best strategy, I think, is to climb to the highest point you can, which inevitably leads to the dirt jump section ... maybe. Honestly, someone needs to map that place. It's also a place where some swamp walks could be a huuuuuuuuuuge benefit. Anybody looking to develop a trail, check out Fox Park!