yep, how far are you willing to drive, and how big do you need?
local / within the city, White Rock area is pretty big
suburban, SW of town, Joe Pool Lake area has the escarpment, nice hill. Also a few here and there in other parts of town
driving an hour or so, go West of Fort Worth (consult google maps, use the 'terrain' button)
driving 2-4 hours, go North on 75 to Oklahoma (google "Talimena Scenic Byway")
4+ hours, you got the TX hill country, or Arkansas.