Lake Opinicon, Ontario, Canada

Lake Locations:

Canada - Ontario -

Also known as:  Rideau Lakes

Opinicon Lake is part of a chain of lakes known as the Rideau Waterway in Ontario, Canada. The lake is connected to others by a canal system called the Rideau Canal. The Canal has 45 locks at 23 stations connecting more than eight lakes including Lower Rideau Lake, Big Rideau Lake, Upper Rideau Lake, Newboro Lake, Clear Lake, Indian Lake, Sand Lake, and Whitefish Lake. These lakes are a large part of Canadian history dating back to the 1800s, and many still operate with wooden doors and hand cranks. Opinicon Lake connects to Indian Lake through the Chaffey’s Lock, and to Sand Lake through the Davis Lock. With endless amounts of entertainment, Opinicon Lake is sure to capture your heart.

With a maximum depth of 35 feet and an average depth of 8 feet, Opinicon Lake has 1,944 acres of dazzling blue waters. Anglers will reel in species such as walleye, northern pike, largemouth bass, smallmouth bass, and yellow perch. Whether you’re boating, canoeing, or kayaking you will see your share of wildlife. Loon, blue heron, osprey, and other waterfowl inhabit the area and stop off at the lake during the spring and fall. Turtles and frogs are plentiful in the lake. While sailing the open waters, expect to see turtles sunbathing on a log, beavers gathering wood, otters making a splash, and even muskrats following your wake. You won’t have to leave the shore to see hummingbirds flit back and forth and fireflies light up the night.

For those keen on seeing more wildlife, plan a day hike on the Rideau Trail. This popular trail crosses a range of terrain from placid farmland to the rugged Canadian Shield. The trail provides 240 miles of both public and private lands available to hike, snowshoe, and cross-country ski. For a less arduous hike, try the Cataraqui Trail just north of Opinicon Lake. The trail offers exquisite views following the Napanee River and former Canadian National Railway line. Visit during any season for hiking, biking, horseback riding, snowmobiling, and cross-country skiing.

To the northwest is Murphys Point Provincial Park, offering groomed trails and guided tours of a restored mica mine. The park also offers boat-in campsites at Big Rideau Lake. With its mix of open fields, mature forests and wetlands, Murphys Point offers a diversity of wildlife such as deer, porcupine, coyote, mink, fisher, and waterfowl. The park offers excellent birding opportunities and wildflower displays. During the spring and early summer catch a glimpse of scarlet tanagers, indigo buntings, yellow warblers and Baltimore orioles.

Opinicon Lake is full of life no matter what season you decide to visit. The winter brings many visitors to Portland city for the annual international speed skating tournament along Big Rideau Lake. The tournament is known as Skate the Lake, but is not the only popular place to ice skate. A section of the Rideau Canal becomes the world’s largest ice skating rink with nearly 5 miles of ice for your skating pleasure. The Township of the Rideau Lakes also hosts many annual events including gardening shows, cycling tours, camps, and music festivals.

Opinicon Lake has plenty of museums to satisfy any history buff. At the northern tip of the lake is Chaffey’s Lock. There you will find the Lockmaster’s House Museum. Built in 1844, the house acted as a low cost substitute for a blockhouse to defend the canal against American-based raiders. Make your way over to Delta to see the Old Stone Mill built in 1810. It is one of the earliest surviving, fully automatic, grist mills of Upper Canada and has been declared a National Historic Site.

With plenty of vacation rentals and real estate properties for sale, Opinicon Lake has plenty to offer. Take the time to plan a trip here with your family and friends and enjoy the year-round fun.

Things to do at Lake Opinicon

  • Vacation Rentals
  • Fishing
  • Boating
  • Sailing
  • Canoeing
  • Kayaking
  • Camping
  • Hiking
  • Ice Skating
  • Biking
  • Cross-Country Skiing
  • Snowmobiling
  • Horseback Riding
  • Wildlife Viewing
  • Birding
  • Provincial Park
  • Museum

Fish species found at Lake Opinicon

  • Bass
  • Black Bass
  • Largemouth Bass
  • Northern Pike
  • Perch
  • Pike
  • Smallmouth Bass
  • Walleye
  • Whitefish
  • Yellow Perch

Lake Opinicon Photo Gallery

Lake Opinicon Statistics & Helpful Links

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Lake Type: Natural Freshwater Lake, Dammed

Water Level Control: Parks Canada

Surface Area: 1,944 acres

Normal Elevation (Full Pond): 390 feet

Average Depth: 8 feet

Maximum Depth: 35 feet

Water Volume: 16,126 acre-feet

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Trophic State | LakeLubbers

Trophic State measures the level of algae and nutrients in a lake.

An oligotrophic lake is very clear (blue in color) and does not support much plant or fish life. A hyper-oligotrophic lake is the clearest of all lakes, and is nearly devoid of plants and fish.

A mesotrophic lake is slightly green and supports a moderate degree of plant and fish life. A lake's most desired trophic state is generally this mid-point - the mesotrophic state.

A eutrophic lake is somewhat murky and supports a large amount of plant and fish life. A hypereutrophic lake is clouded with algae, plant life, and fish life. A eutrophic or hyper-eutrophic lake can be difficult to navigate by boat - and is often an unpleasant place to swim.

The use of phosphorus-rich and nitrogen-rich fertilizer on lawns and golf courses surrounding a lake can cause it to become eutrophic or hypereutrophic.


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Catchment or Drainage Area | LakeLubbers

This is the surrounding area that drains into a lake, including land, rivers and their tributaries. This is also known as the lake's "catchment basin".

Small lakes at the highest peaks of mountains have small drainage areas. The world's oceans have the largest drainage areas.


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Lake-Area Population | LakeLubbers

This is the estimated number of people who live in a house with a view of a lake, plus those who self-describe the lake as their home, for example: "I live at Smith Mountain Lake."


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Water Residence Time | LakeLubbers

This is the estimated time that it takes for an amount of water equal to the entire volume of a lake to flow out of - or evaporate from - the lake.

Residence Time can be as short as a few days for fast-flowing small lakes, and can exceed 100 years for slow-flowing large lakes.


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Completion Year | LakeLubbers

This is the year that a reservoir was first filled to the reservoir's normal elevation - or the year that a natural lake was first dammed. A large reservoir can take more than a year to fill after its dam is first closed.

The Grand Anicut in southern India is generally considered the world's oldest dam that still operates. Grand Anicut was constructed in the second century BC. It now impounds an irrigation network that includes roughly one million acres.

You can find many of the the world's newest reservoirs on LakeLubbers. Many of the world's oldest reservoirs appear on the last page of that list.


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Water Volume | LakeLubbers

This is the estimated volume of water that a lake contains -- measured at the lake's normal elevation. By this measure, the world's largest freshwater lake is Siberia's Lake Baikal.

You can find many of the the world's largest lakes (by water volume) on LakeLubbers.

Water Volume can be measured in acre-feet, in cubic miles, or in cubic kilometers. One acre-foot is the amount of water needed to cover one acre (43,560 square feet) to a depth of one foot. One cubic mile equals 3,379,200 acre-feet. One cubic kilometer equals 810,713 acre-feet.

1 acre-foot is equal to 325,851 US gallons. Siberia's Lake Baikal contains about 6,276,367,740,000,000 gallons of freshwater - nearly 1 million gallons for every living person on earth.

The other - and more widely used - measure of a lake's size is the lake's surface acreage. By that measure, the world's largest freshwater lake is North America's Lake Superior.


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Maximum Depth | LakeLubbers

This is the estimated greatest depth of the water in a lake -- measured at the lake's normal elevation. The world's deepest lake is Siberia's Lake Baikal; that lake's maximum depth is estimated at 5,314 feet.

You can find many of the the world's deepest lakes on LakeLubbers. If you select the last page of that list, you will find the (maximum depth of) the shallowest lakes in our database.


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Average Depth | LakeLubbers

This is the estimated average depth of the water in a lake -- measured at the lake's normal elevation. If the water volume and surface area of a lake are known, an estimate of the lake's average depth can be calculated:

Water volume ÷ Surface Area = Average Depth

Example: 1,000,000 acre-feet ÷ 20,000 acres = 50 feet average depth


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Maximum Elevation | LakeLubbers

This is a lake's highest water level, measured by the lake's surface distance above sea level, that can occur during flooding. A lake's highest possible maximum elevation is usually the top of the lake's dam or spillway.

At lakes that include residential development, government regulations usually forbid the construction of homes below a lake's maximum elevation.


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Minimum Elevation | LakeLubbers

This is a lake's lowest water level, measured by the lake's surface distance above sea level, that can be reasonably expected to occur. Low lake levels can occur due to deliberate seasonal draw downs for irrigation or impending snow melt, reduced water inflows, drought and evaporation, residential or commercial water demands, and hydropower generation.

Some lakes' minimum and maximum elevations are virtually the same. Lakes that generate hydropower may vary by several feet - according to power demand. Lakes whose primary purpose is to prevent flooding can seasonally vary by 100 feet or more.

When some lakes reach their minimum elevation, their boat ramps may not be long enough to permit boat access - and boats docked on shallow parts of the lake may end up on dry ground. In those cases, kayakers and shore-based anglers may be among the few happy recreational users of the lake.


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Normal Elevation | LakeLubbers

This is a lake's normal water level, measured by the lake's surface distance above sea level. For a reservoir, this water level is also known as "full pond" or "full pool".

You can find many of the world's highest-elevated lakes on LakeLubbers. Lakes with the lowest elevations (known by LakeLubbers) are shown on the final page of that list.


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Shoreline Length | LakeLubbers

This is the length of the exterior shoreline around a lake - measured at the lake's normal elevation. The shoreline length can be considerably shorter or longer when lake water levels are lower or higher than normal.

A lake with many coves has a much longer shoreline than a lake of similar surface area that is nearly circular in shape.

When known, the shoreline miles that we report in our statistics include only the lake's exterior shoreline, and exclude the shorelines of islands located within a lake's boundaries. In lakes with many islands, those islands' combined shorelines may exceed a lake's exterior shoreline.

You can find many of the world's longest-shoreline lakes on Lakelubbers.


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Surface Area | LakeLubbers

This is the area (acreage, square kilometers, etc.) of the top surface area of a lake - measured at a lake's normal elevation. The surface area can be considerably smaller or larger when lake levels are lower or higher than normal. North America's Lake Superior is the world's largest freshwater lake by this measure.

The other measure of a lake's size is the lake's water volume. By that measure, the world's largest freshwater lake is Lake Baikal in Siberia.

You can find many of the world's largest lakes (acres) on Lakelubbers. There is no widely-accepted minimum surface area that defines a lake. What Lakelubbers describes as a lake, you might call a pond. The smallest lake that Lakelubbers currently includes is Hawaii's 2-acre Lake Waiau.


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Water Level Control | LakeLubbers

This is the organization that controls water releases or outflows from the lake or reservoir. In the USA, this is often the US Army Corps of Engineers, a power company, a municipal water system, an irrigation district, or a paper manufacturing company. In the case of private or gated lakes, a homeowners' association may be the lake's controlling authority.

Many lakes cross borders, including North America's Great Lakes. The control of such lakes and their coveted freshwater may be amicably shared - or hotly disputed.

"Water wars" continue at many lakes as growing populations and crop irrigation needs compete for the freshwater that lakes contain.


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Lake Type | LakeLubbers

There are 3 basic types of lakes that are currently included on LakeLubbers. 2 types may be dammed or not dammed, producing 5 classifications.

- A Reservoir is a man-made freshwater lake that is usually created by damming rivers.

- A Natural Freshwater Lake occurs naturally - often by glacial activity - and has a salinity of less than 30 parts per thousand. It may be dammed to produce electricity or for other reasons.

- A Natural Saltwater Lake occurs naturally and has a salinity of more than 30 parts per thousand (ppt). It may be dammed.

"Brackish" water may be categorized as freshwater or saltwater, depending on its salt content (salinity). Oligohaline water has less than 15 ppt of salt. Mesohaline water has 15-29 ppt. Polyhaline has 30-335 ppt.


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