I wasn't paying close attention at the time and released this fish very quickly after the picture, so I thought it was just a skinny brookie and didn't notice until looking at the photo that it's a juvenile bull trout. Good thing I was all-C&R on this trip anyway!
Troutnut.com is a collection of pictures and information about fly fishing. Fly fishermen, fly tiers, and trout enthusiasts of all stripes can learn more about life beneath the surface of trout streams, as well as how to better imitate aquatic insects with artificial flies to catch trout. There are aquatic insect pictures, underwater pictures, landscape pictures, and a comprehensive reference to the common names of trout stream insects.