Where Ontario Learned to Raise Fish
Today, Mount Pleasant Nature Park is a peaceful place to spend an afternoon. Visitors come to enjoy the walking trails, watch wildlife around the ponds, or simply relax beside the water. At first glance, it looks like a typical community park, but hidden beneath its quiet appearance is the story of a place that forever changed fisheries management in Ontario.
This valley was once home to Ontario’s first provincial fish hatchery, a facility that helped shape the province’s approach to fish conservation and stocking for more than half a century. Although the hatchery itself closed decades ago, much of the landscape you see today still reflects the work that began here in 1909. The ponds, water control structures, and the original hatchery building all remain as reminders of a time when this small community became the centre of an ambitious new conservation effort.
By the early 1900s, Ontario’s lakes and rivers were under increasing pressure. Expanding settlement, industrial development, pollution, dams, and heavy fishing had reduced populations of many native fish species. The newly established Ontario Department of Game and Fisheries recognized that protecting fish populations would require more than regulations alone. If fish stocks were to recover, they would also need to be replenished, and that meant finding a way to successfully raise fish before releasing them into waters across the province.
In 1909, the province selected Mount Pleasant as the location for its first provincial fish hatchery. The site offered exactly what hatchery operators needed: a dependable supply of clean, cold water and enough space to build a series of rearing ponds. Construction began almost immediately, transforming the property into a modern fish culture station. Mount Pleasant Creek was diverted and controlled, ponds were excavated, dams and berms were constructed, and an entirely new water management system was created to provide a constant flow of fresh water through the facility.
The original hatchery consisted of seven separate rearing ponds, each designed for different stages of fish production. Water continually flowed through the ponds before returning to the creek, providing the oxygen-rich environment necessary for healthy fish. The entire system relied on gravity, carefully engineered channels, and a network of dams and spillways that regulated water levels throughout the property. Every part of the landscape was designed with a purpose, and while the hatchery buildings have changed over the years, much of that engineered landscape can still be recognized today.
The building that stands within the park today was completed in 1915 and served as the operational headquarters for the hatchery. From here, staff managed every aspect of the facility, from collecting and incubating fish eggs to monitoring water quality and preparing young fish for release. At a time when fish culture was still a relatively new science, Mount Pleasant became an important centre for developing techniques that would later be used throughout Ontario.
Although the hatchery was originally established for the experimental rearing of largemouth bass, its role quickly expanded. Over the years, brook trout, brown trout, lake trout and several other species were raised here before being stocked into lakes and rivers across the province. Millions of fish began their lives in these ponds, eventually supporting recreational fisheries and helping restore populations in waters where natural reproduction alone could no longer keep pace with demand.
Unlike many hatcheries that operated quietly behind the scenes, Mount Pleasant quickly became a destination in its own right. Contemporary newspaper articles described the property as one of the “beauty spots of the Province.” Flower gardens, manicured lawns, ornamental trees, and carefully maintained grounds welcomed thousands of visitors each year. What had been built as a working hatchery also became an educational attraction, allowing the public to see firsthand how fish were raised and why conservation mattered.
As fish culture techniques continued to improve, so did the facility itself. In 1962, Mount Pleasant achieved another distinction when it became Ontario’s first supervised public fishing catchery. The original seven rearing ponds were reconfigured into the three larger ponds that remain today, allowing visitors to fish for regularly stocked trout in a controlled setting. Throughout the fishing season, the ponds were replenished twice each week, and opening day became one of the community’s biggest annual events. Cars lined Mount Pleasant Road for hundreds of metres as anglers arrived hoping to catch freshly stocked fish. For many Ontario families, this was their introduction to recreational fishing.
The hatchery continued operating until 1965 before its primary fish production activities ended. The public catchery remained open for several more years before finally closing in 1981. By then, newer and larger hatcheries had taken over many of the functions that had once made Mount Pleasant so important, but its place in Ontario’s conservation history had already been secured.
Today, the hatchery no longer raises fish, and nature has softened many of the engineered features that once defined the property. Even so, the clues are still everywhere for those who take the time to look. The three ponds occupy the same valley where seven rearing ponds once operated. Water continues to move through dams, spillways and channels that trace their origins back to the hatchery era. The original hatchery building still overlooks the ponds, and the carefully managed flow of water remains the heart of the site, just as it was more than a century ago.
It’s easy to walk through this park without realizing what you’re seeing. To most visitors, they’re simply ponds surrounded by trees. In reality, these ponds represent the birthplace of Ontario’s provincial fish hatchery system. The ideas tested here helped shape fisheries management across the province, and generations of anglers unknowingly benefited from work that began in this quiet corner of Brant County over a century ago.
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Posted Coordinates - Main History Sign (Mount Pleasant Nature Park)
According to the history plaque, what was the original purpose of the provincial fish hatchery when it opened in 1909, and what species was it initially established to raise?
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Posted Coordinates - Main History Sign (Mount Pleasant Nature Park)
The hatchery later achieved another provincial first. What was it changed into in 1962, and how many ponds were created during that redevelopment?
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Virtual Stage - Pond #1 Sign - N 43° 04.254′ W 80° 18.991′
The Rainbow Trout information panel explains what these fish eat. List two foods that make up the diet of Rainbow Trout.
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Virtual stage - Pond #2 Sign - N 43° 04.321′ W 80° 19.134′
The Pine Plantation panel explains why the Red Pine plantation has not thrived at this location. According to the sign, why is it considered puzzling that the plantation was established here?
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Observation Question - Observation Point - N 43° 04.337′ W 80° 19.206′ -
Identify one feature you can see from this vantage point —such as a berm, spillway, dam, standpipe, or channel—that demonstrates this was once a working fish hatchery. Briefly describe what you observed and how you think it would have helped the hatchery operate.
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Mandatory Photo - Hatchery Building - N 43° 04.246′ W 80° 18.966′
Post a photograph of yourself or a personal item (GPS, geocaching name tag, trackable, etc.) with the original hatchery building or one of the hatchery ponds visible in the background. Your face does not need to appear, but the photograph must be unique to your visit.
Virtual Rewards 5.0 - 2026-2027
This Virtual Cache is part of a limited release of Virtuals created between February 3, 2026 and February 3, 2027. Only 4,000 cache owners were given the opportunity to hide a Virtual Cache. Learn more about Virtual Rewards 5.0 on the Geocaching Blog.
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