That is the Brazos River and it is public land up to the high water mark. Some said we were illegal because "moter driven" vehicles are not allowed on the river. A meting on a gravel bar with the local game warden cleared that up when he check my interpretation of the law. Our wheels are not driven by an engine, we are like an airboat with wings. I was pretty relieved after he climbed up the bluff to get cell service and came back and informed me that after reading the law that he and his boss agreed with me. We do have to be curtious, some of the local deer hunters have gotten pretty upset with us so even though we can legally land in areas we have chosen to avoid certain parts of the river during deer season.
Here is a website that will show you who the land owners are and public lands.
https://www.onxmaps.com/