We've found a lot of ponds in Allen. Most are great for a quick fishing trip. I would like to take him somewhere a bit more remote. He likes to hike in the woods and explore and look for coyotes and skunks. There are a lot of creeks in the area so I've been looking for one where we could walk in the forested area and find a creek for fishing. I found a few, but they are a bit overgrown for him.
Plano has a great set of trails, both paved and non paved. Most will run along creeks, check out this link for trail maps and great information:https://www.plano.gov/946/Trail-Maps
This will give you links to detailed pdf maps of the area.
I used to live in plano and was happy when they came out with this information.