It's not THE Colorado river. It's a Colorado river that begins southeast of Lubbock, TX and flows through Texas hill country, down to Matagorda Bay on the Gulf of Mexico. I think I read that it was around 860 miles long.
Hang on, let me run down and snap a pic from the shore....
We walked down here the other day and frightened a turkey vulture that was feasting on a couple of fish lying on the shore.
Here are a few pics from around the park.