Could very well be a mountain lion. My buddy was mountain biking on the trails around the Bristol Hills area just southeast of Rochester about 10 years ago and swore he saw a mountain lion.
Texas wildlife officials denied for years that there were mountain lions in the suburban DFW area. Then one of the big cats managed to get itself killed. And the wildlife officials got strangely quiet on the issue.
After all, the old nickname for Fort Worth used to be “Pantherville”.