{"id":411,"date":"2026-05-31T19:32:15","date_gmt":"2026-05-31T19:32:15","guid":{"rendered":"https:\/\/sanfranciscomovingguide.com\/?p=411"},"modified":"2026-05-31T19:32:15","modified_gmt":"2026-05-31T19:32:15","slug":"5800-rainbow-trout-faced-a-bleak-death-sentence-an-emergency-rescue-saved-them","status":"publish","type":"post","link":"https:\/\/sanfranciscomovingguide.com\/?p=411","title":{"rendered":"5,800 rainbow trout faced a ‘bleak’ death sentence. An emergency rescue saved them."},"content":{"rendered":"
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North of\u00a0Susanville, on the edge of the Great Basin, Eagle Lake is a wild and beautiful body of water with an undulating shoreline. Sagebrush flats roll off to the north. Pine and fir trees border the southern edge of the lake. It\u2019s the second largest freshwater lake that\u2019s entirely within California, a closed basin with alkaline water, one main tributary and no outlet.\u00a0<\/p>

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Out of that unique environment came a remarkable subspecies of colorful and resilient rainbow trout: the Eagle Lake rainbow trout. Among its attributes, it can survive in severe conditions and outlives other species of rainbow trout: The oldest on record is 11 years old, compared to the 4- to 6-year average lifespan.\u00a0<\/p><\/div>

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The trout\u2019s resilience and adaptability is one reason why it plays such a big role in the California Department of Fish and Wildlife\u2019s hatchery operations. The department stocks Eagle Lake rainbow trout in waters across the state for recreational fishing. But Eagle Lake \u201cis the only place in the world where they were originally found,\u201d said Paul Divine, fisheries biologist for the California Department of Fish and Wildlife\u2019s district in Lassen and Modoc counties.<\/p><\/div>

Come spring, Eagle Lake rainbow trout migrate upstream on the lake\u2019s main tributary, Pine Creek, to spawn. The problem is, Pine Creek can be a gamble. The arid creek only flows for a few months out of the year and quickly dries as the weather warms up.\u00a0<\/p><\/div>

\u201cPine Creek flows through some very wide, open valleys that are basically just sagebrush flats. There\u2019s no trees or riparian vegetation. So it can warm up really rapidly,\u201d Divine said.<\/p><\/div>

This year saw a volatile combination of snowstorms in December and February, followed by rain and a record-setting heat wave. That meant thousands of fish had already begun their migration upstream Pine Creek and were at risk of getting stranded as the creek threatened to dry up faster than the fish could swim downstream to Eagle Lake.\u00a0<\/p><\/div>

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A death sentence loomed for thousands of trout caught in a small section of Pine Creek that was less than a mile long. Bald eagles, ravens and turkey vultures circled in the sky, ready to feed on the fish. The outlook was \u201cbleak,\u201d Divine said. Something had to be done.\u00a0<\/p><\/div>

This spring, the California Department of Fish and Wildlife launched an emergency rescue operation to save 5,800 Eagle Lake rainbow trout from getting stranded in Pine Creek. It wasn\u2019t the first time Eagle Lake rainbow trout have been stranded, but it was the largest rescue in more than a decade.<\/p><\/div>

Over four days in March and April, 25 biologists, hatchery staff and volunteers climbed down to the banks of Pine Creek, equipped with waders and fishing nets. Their mission was to trap as many fish as possible and transport them in trucks equipped with water tanks so they could be released in Eagle Lake.<\/p><\/div>

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Heavy duty plastic bags were deployed: \u201cJust put a little water in the bag, put a few fish in, swing it over your shoulder and carry them up the hill to a truck,\u201d Divine said.<\/p><\/div>

At other times, the operation was more complicated, especially in places where water was flowing and the fish could easily swim around the nets into deeper pools. In those instances, the rescuers used backpack electrofishing units that emit a small electrical current to the water and stun the fish, temporarily immobilizing them, giving rescuers a window to corral the fish in a large net and contain them in a holding pen.\u00a0<\/p>

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Some places along the creek were far from the road. Rescuers formed a line down the sagebrush-studded hillside, about 15 people long, and handed the fish one by one up the hill. \u201cIt was like a bucket brigade, just handing them off to get them up the hill,\u201d Divine said.\u00a0<\/p><\/div>

Eagle Lake rainbow trout are a hardy species. Their precarious environment, especially when they are spawning in Pine Creek, has taken a toll in the past. In the 1930s and 1940s, their population numbers dipped to historic lows, and in 1959, wildlife officials built a weir to trap fish in Pine Creek, launching a hatchery for the Eagle Lake rainbow trout. \u201cThis program is believed to have saved the species from extinction,\u201d a states. However, the reliance on \u201cartificial propagation\u201d has an unwanted impact on the gene pool. So in 2012, wildlife officials built a \u201cfishway\u201d that lets some trout pass through farther upstream to spawn naturally.\u00a0<\/p><\/div>

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Extreme weather conditions, driven in large part by climate change, are making life even more unpredictable for the Eagle Lake rainbow trout.\u00a0<\/p><\/div>

\u201cWe\u2019re seeing more extremes, extreme dry or extreme wet,\u201d Divine said.<\/p><\/div>

In wet years, the trout can swim far upstream and spawn naturally, with plenty of time for adult and juvenile fish to make their way back to the lake.\u00a0<\/p><\/div>

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