Been doing some searching online and haven't found any great data on longevity of Lahontan Cutts in Basin seep lakes. I've read that Rainbows and Browns have much faster growth rates of course, but considerably shorter lifespans in the fertile seep lakes. Between harvest, predation, and natural death they say that the max lifespan is about 4 years tops for Rainbows and browns. Some people have discussed parasites and other plausible causes. Anyone know how long the Lahontans live in Grimes and lake Lenore? Been slow fishing at Lenore this spring I've heard.