There are not really any trails of sorts in the Dr. P area. I would suggest heading to the West Orange Trail which is a little north & a little west of there. The easiest way there is take the Turnpike North to the second 50 exit & the trail head is right there. You can get there through non-toll roads; just go a little west of Oakland. It is a nice trail with water & bathroom stops & you will see lots of others on the trail with you.

There is suppose to be an offroad trail off I-Drive south of the Sea World; but I have never ridden on it so I really can't reccommend it; but it will be closer to you.