Gotta love the pteronarcys.
The McCloud and Upper Sacramento Rivers. Very popular with the rich back in the early 1900's, and the first rainbow trout ever reared in a hatchery were reared in that area of Shasta County, CA, and those rainbows were released in thousands upon thousands of lakes, rivers, creeks, and brooks around the world. All rainbow trout are derived from those first rainbows. At one point the Upper Sac( before the invasion of the whites) hosted over 9,000 fish per mile, but that was over a century ago.