I was in Houston a few weeks ago and was reminded how flat that fun, wicked city is - but water does run off there. In parts of the Texas Panhandle, rain gathers in playas and sits until it evaporates rather than running off down a watershed. There's a place out between Dalhart and Dumas so flat that if you squint hard enough you can see yourself standing on the far horizon.

Around Dallas? Far from the hilliest part of the state, but I can take you on rides that would get most of you out of the saddle in your lowest gear. No big climbs, just little rollers. Nasty little rollers.

Best,
TCS

Fun fact: The 17% grade up to the McDonald Observatory above Ft. Davis, Texas, will take you to 100 feet higher than any point east of the Mississippi.