So here is the elevation profile for this particular ride: view map here. I've got 39 miles mapped out but there is a lot more there to ride that I've found since I last mapped it out. The best part of this ride is the low traffic! Only about 7 cars passed me on the last ride...and I don't think I've ever had more than 12 pass me.
Most people think of Texas, especially North Central Texas, as very flat, and it is in a lot of places, but this ride has some great hills. They aren't long hills, but there are a lot of them!