Little hard to find around the metroplex area. At least I haven't had any luck yet in the immediate vicinity. If you go south west out of town or west towards Mineral Wells you can find some decent roads. I'm from that area and know where most of the good ones are at. Farm Road 4 out in Palo Pinto county is a pretty good drive between the town of Palo Pinto and Santo. Also if you can make it down to Granbury Hwy 51 going southwest out of Granbury is a really good road. There's also some pretty good back roads to take between Weatherford and Mineral Wells/Milsap which are just two lane (sometimes 1.5 lane) country roads.
If you ever get a free weekend I suggest heading down to Kerrville, Tx area and hitting the "Three Sisters". I've done those roads on both two and four wheels and it's some of the best riding/driving I've ever done.