The Mt Whitney hatchery is a beautiful place in Independence off the 395
https://www.wildlife.ca.gov/Fishing/.../Mount-Whitney
I haven't been there for about 7 years but they have a nice pond full of brood stock that you can feed. (Bring quarters for the pellet machines)
I don't think the hatchery itself is operational anymore but it's a nice scenic area to stop and enjoy the beauty.