It is in Davis OK. Near I35 and 77 It is about 125 miles from Dallas.
Here is a link to the website:
http://www.turnerfallspark.com/
Turner Falls Park is located in Davis, Oklahoma. The actual town of Davis, the part where houses and stores are located, is about 7 miles from Turner Falls. Davis is one of those small towns that is very well kept. Like Main Street in Disneyland with vintage street lights, flower boxes and an overall attractive appearance. Don't go to Turner Falls Park without checking out Davis. There are a dozen or so restaurants in Davis, including chains like Sonic Drive In, Subway and Pizza Hut. You can go to Babe's Hot Tamales or Las Cascadas for Mexican food. Or Smokin Joes Rib Ranch for Okie BBQ. In addition to Babe's and Smokin Joes there are several other homegrown eateries, like Bill's Chester Fried Chicken, Burgerland (no idea what the cuisine might be at Burgerland), Coree's Dougherty Diner, Main Street Restaurant, Snak Shak I-35 & the Specialty Bakery (if you are in need of a good doughnut).
On your way to Turner Falls Park, at Exit 51 from I-35, you'll see a sign that says "Fried Pies". This is the location of "Nancy's Original Fried Pies". You will want to stock up on some of Nancy's pies before you spend the day at Turner Falls. The pies have pretty much achieved a sort of cult status. They are good. Fattening, but good. The most popular is apricot. Other flavors are pecan, cherry, pineapple, blackberry, apple and others. Nancy makes sugar-free pies for those who can't eat sugar. There are a few cream pies like lemon and chocolate. And what Nancy calls Savory Pies. These are like chicken pot pies in turnover form.