Arbor hills nature preserve is a great local Plano trail system. It has the best of both worlds OR should i say the best of all 3. Not only does it have the paved trails you may find in neighborhoods but it also has a designated hiking running dirt trail & also a dedicated biking trail system. Here is my Strava data from one of the recent times I went & walked the trails.
Not only are there these trails but its super family friendly. There is FREE wifi, restrooms, ample parking and a large playground for kids. To see the City website click here.