Wild brown trout are the dominant species in the Upper Arkansas River, with other trout species in the river, creeks and nearby lakes.
The brown trout is the dominant species in the Upper Arkansas River, and this fishery is one of the finest for wild brown trout in the state.

You will occasionally find your hook in a rainbow or cutthroat in the river, but those species are stocked and mostly found in the surrounding lakes.
The smaller streams support a healthy population of wild browns and brook trout.
You will find cutthroat trout in the high alpine lakes in the area.