Lake Golcuk, Turkey

Lake Locations:

Turkey -

Also known as:  Golcuk Golu

A favorite day trip for residents and visitors to Bolu, Lake Golcuk is one of the most scenic sights in the north-western region of Turkey. Created in 1958 when a dam impounded the waters from melting snow, Lake Golcuk covers about 11 acres between heavily-forested, low hills. Only nine miles from the City of Bolu, Lake Golcuk is the perfect spot for picnics, nature walks and cool breezes. At 3957 feet above sea level, Lake Golcuk’s shores are cooler on hot summer days than the city below. In winter, snow frosts the surrounding pines and occasionally forms ice across the surface of the lake. Lake Golcuk is beautiful year-round and in demand as a spot for weddings, picnics and photography.

Declared a Nature Park in 1991, 16,516 acres surrounding Lake Golcuk protect a unique environment replete with numerous birds, animals and varied plants. Trees surrounding the lakeshore include black pine, white oak, spruce, acacia, cedar and cluster oak. Fox, badger, quail, partridge, pigeon and rabbit are often seen among the trees, while frogs enjoy the wetter areas near the lakeshore. To make walking easy along the mile of shoreline, a paved walking path meanders along the lakefront with numerous vantage points to look out over a particularly scenic vista. The most leisurely stroll can be completed in less than two hours, but those who prefer to ride can take the rubber-tired ‘train’ with its excursion cars along the road circling the lake. Pedal boats are rented here, so visitors can travel via water to explore the lake. Lake Golcuk holds several varieties of carp, mullet and other species. Lake Abant trout have recently been stocked here. It isn’t clear if fishing is allowed, but a call to the Department of Nature Conservation and National Parks could provide that information.

A picnic area with tables is provided but grills are not. Most people pack a small portable grill with them for the day. Charcoal, charcoal lighter and all types of picnic supplies, including sausages for grilling, can be purchased at the little convenience store at the park. Those who don’t pack a lunch can easily stop at one of the two small restaurants located near the shoreline. The restaurants serve fresh fish and the famous mezes or Turkish ravioli. All visitors to the park should be prepared to do a bit of walking as cars are not permitted past the parking area. Non-walkers should plan to take the sight-seeing train.

The best times for visiting Lake Golcuk are from April to October. Green gives way to reds, golds and yellows in the fall when the surrounding trees turn color. The lake is beautiful in winter, and those with cross-country skis may find this their favorite time for a Lake Golcuk visit. Due to the park’s closeness to the City of Bolu, summer weekends are busy with many visitors. Weekday visits will provide more solitude.

The City of Bolu is cosmopolitan and growing. Many new apartment blocks and condos are being built to accommodate a growing population, including a large ex-pat community. Midway between Ankara and Istanbul, Bolu is blessed with good roads, great shopping and plenty of restaurants noted for fine cuisine. Free admission at the Bolu Museum offers the opportunity to view a wide array of artifacts from past civilizations and ethnic groups that inhabited the region in the past. Particularly well represented are the artifacts left by the Romans starting around the second century AD.

In addition to scenic Lake Golcuk, nature lovers can find plenty of opportunity to explore the varied climate and topography of this region of Turkey. The scenic Seven Lakes of Yedigollar National Park are only a short distance away. Beautiful Lake Abant is a must-see attraction featuring numerous hotels and spas around the shoreline of a lovely, scenic lake. Visitors can rent a car, but finding many of the hidden treasures and out-of-the-way marvels requires a driver well-versed in local history and lore. Numerous ancient mosques and churches, ruins of fortresses and ancient villages are hidden among the farms, hills, valleys and forests. Many visitors find they must return again and again to explore some feature that haunts their dreams upon returning home. Turkey is a study in contrasts, with thoroughly modern facilities offering conveniences and numerous ancient edifices highlighting its long history as a world-changing frontier.

Luckily, the area around Lake Golcuk is easy to reach by car from either Ankara or Istanbul. Bus service from Bolu is available on regular schedules. The lovely mansion shown in so many pictures of Lake Golcuk is not publicly available to guests, but there are others within a mile or so of the shore. Other lodgings exist in the area, many open year-round as the Kartalkaya ski area is only about 20 miles away. A variety of lodgings can be found in the vicinity, including modern hotels in Bolu, spa resorts in the city, guest houses in the countryside, and even resort-style hotels near Lake Abant. Many in the upland regions are open year-round to serve visiting skiers. And for those quiet strolls among forested hills, Lake Golcuk is always inviting.

Things to do at Lake Golcuk

  • Vacation Rentals
  • Fishing
  • Boating
  • Picnicking
  • Birding
  • National Park
  • Museum
  • Ruins
  • Shopping

Fish species found at Lake Golcuk

  • Carp
  • Trout

Lake Golcuk Photo Gallery

Lake Golcuk Statistics & Helpful Links

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Lake Type: Artificial Reservoir, Dammed

Surface Area: 11 acres

Shoreline Length: 1 miles

Normal Elevation (Full Pond): 3,975 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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