Geist Reservoir, Indiana, USA

Lake Locations:

USA - Midwest - Indiana - Central -

Also known as:  Geist Lake

Originally built in 1944 as a water supply reservoir for Indianapolis, Geist Reservoir has become a much desired place to live. The City of Indianapolis controls the dam that is located on Fall Creek providing drinking water as well as regulating the water levels. Geist Lake is located in the counties of Hamilton and Marion and with close proximity to Indianapolis and Fishers, lake residents or vacation renters will find countless things to do.

Real estate around Geist Reservoir offers a diversity of choices for those wanting to be lake residents. Lakefront property, luxurious homes, spectacular lake views, country club settings and more await prospective buyers. Those who already live at Geist Lake can enjoy sitting on the deck watching boaters pass by. With so many houses around the lake, it will not be hard to find a few vacation rentals for those who just like to visit or stay the summer. There are no camping sites around Geist Lake, so overnight accommodations must be made in nearby hotels, bed and breakfast, or vacation rentals with lake side views. Visitors will find lake access at the Geist Marina Ramp. Once on the water visitors can enjoy pleasure boating, fishing, swimming, and all water sports. Anglers will enjoy the large population of largemouth bass.

The rolling hills of Central Indiana give golfers a myriad of scenic locations to enjoy some fun and channeling rounds of golf. Many golf courses and clubs can be found in close proximity to Geist Lake. Championship 18 courses or smaller 9 hole course will satisfy golfers at all level of playing. Nearby, Fishers Trail and Greenway System offer a network of trails that connect parks, neighborhoods, schools, work places and other points of interest. There are many miles of trails that can be used by pedestrians and bicyclists. Those wanting a more eco-friendly transportation to work will find they can bicycle on the trails from Fishers to Indianapolis.

With city life so close to Geist Reservoir, residents and visitors will find so much to do. Shopping and fine dining can be found right around the corner, while some very special attractions can be found within 30 miles. Fort Harrison State Park, located in Indianapolis, provides over 1000 acres of the original Fort land. Visitors enjoy the beautiful hardwood forest while bicycling, fishing, hiking, golfing, nature watching, horseback riding and picnicking. Fort Harrison State Park provides the rural charm that nature enthusiast will love.

Indianapolis sightseers will find the Indianapolis Motor Speedway Hall of Fame Museum which is now considered a National Historic Landmark. The Children’s Museum of Indianapolis is another exciting place to visit. Although it is considered the largest children’s museum in the world, young and old will enjoy all the exhibits and fun things to do. While in downtown Indianapolis, sightseers may want to stop awhile at the Indianapolis Zoo which is home to Indiana’s largest aquarium.

Residents of Geist Lake who would rather stay close to home will find Conner Prairie, which is affiliated with the Smithsonian Museum Institution. Located in Fishers, Conner Prairie visitors can interact with history while enjoying a couple hundred acres of beautiful wooded areas. Also in Fishers is the Fishers Heritage Park at White River. The Heritage Park provides natural settings that can be used for events, parties, weddings and well as nature and wildlife viewing.

After a day of shopping and sightseeing lake residents can return to their lakefront home and enjoy the peaceful movements of the water. Geist Reservoir is a great place to call home for city commuters or retirees.

Things to do at Geist Reservoir

  • Vacation Rentals
  • Fishing
  • Boating
  • Swimming
  • Golf
  • Camping
  • Picnicking
  • Hiking
  • Biking
  • Horseback Riding
  • Wildlife Viewing
  • State Park
  • Museum
  • Shopping

Fish species found at Geist Reservoir

  • Bass
  • Black Bass
  • Largemouth Bass

Geist Reservoir Photo Gallery

Geist Reservoir Statistics & Helpful Links

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Lake Type: Artificial Reservoir, Dammed

Water Level Control: City of Indianapolis

Surface Area: 1,890 acres

Shoreline Length: 35 miles

Normal Elevation (Full Pond): 785 feet

Average Depth: 10 feet

Maximum Depth: 48 feet

Water Volume: 21,180 acre-feet

Completion Year: 1944

Drainage Area: 215 sq. miles

Trophic State: Eutrophic

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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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