Where is Holloway Reservoir?

Holloway Reservoir is a lake in Genesee County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.

How deep is Holloway Reservoir?

Holloway Reservoir has a maximum depth of 25 feet and an average depth of 10 feet. The lake covers 1173.7 acres.

Are there boat ramps on Holloway Reservoir?

Holloway Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Holloway Reservoir Regional Park. Public access is listed as yes.

Can I fish at Holloway Reservoir?

Holloway Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Michigan's fish and wildlife agency, so check its current regulations before you go.

Holloway Reservoir

Genesee County, Michigan1,174 acresView map Directions

No nutrient or algae sampling on record from EGLE for this lake.

Max depth

25 ft

Bathymetric survey

Area

1,174 acres

Surface area

Shoreline

1.3 mi

Measured length

Impaired · Nutrients (phosphorus, nitrogen)
25 ft max depth
Public access

See the measurements Directions Where to stay

Holloway Reservoir in Genesee County, Michigan has water-quality measurements published by EGLE, shown here as reported. Maximum depth: 25 ft. Surface area: 1173.7 acres.

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Water clarity at Holloway Reservoir

Murky water. Across summers from 2018 to 2023, Holloway Reservoir averaged 1.11 m (4 ft) of visibility down into the water, so you cannot see far below the surface in midsummer.

Nobody has taken a water sample here that we can find. Michigan's environmental agency measures clarity on lakes like this one from satellite images instead, which is why this page reports how clear the water is and no phosphorus or algae readings.

Clear is not the same as clean. A lake can be easy to see through and still carry high nutrient levels, and a naturally tea-stained lake can be perfectly healthy. The nutrient and algae readings on other lakes come from phosphorus and chlorophyll-a measured in a laboratory, and clarity alone cannot stand in for them.

The same satellite images put summer algae here at roughly 27.76 micrograms per litre. Estimating algae from orbit is far less exact than measuring clarity, so that figure is worth knowing and is not part of any rating.

Holloway Reservoir is a 1,174-acre lake in Genesee County, Michigan with a maximum depth of 25 feet (10-foot average). Limited fish-species data available. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, EGLE. Methodology: how these readings are compared.

What Holloway Reservoir is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Big water1,174 acres

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Holloway Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), pFAS, pCBs. Check local advisories before you swim.

Whether Holloway Reservoir is safe to swim in today is a call for the Michigan Department of Environment, Great Lakes, and Energy (EGLE) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Holloway Reservoir

These are the measurements EGLE publishes for Holloway Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

No clarity data. TSI undefined.

Ask about Holloway Reservoir

Answers come straight from the public measurements and survey records on this page.

Lake Details

Max depth

25 ft

Average depth

10 ft

Surface area

1,174 acres

Shoreline

1.3 mi

Public access

Yes

Listed by EGLE

Recreation & Access

Boat Landings

Yes

Public Access

Holloway Reservoir Regional ParkPublic

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

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Stays near Holloway Reservoir

Compare lakeside cabins, hotels, and vacation rentals near Holloway Reservoir in Genesee County, Michigan — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

Top-rated places to stay near Holloway Reservoir

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Fishing Holloway Reservoir

→ Holloway Reservoir fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Holloway Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Nutrients (phosphorus, nitrogen)PFASPCBs

Designated uses not supporting: Aquatic life, Fish consumption.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MI040802040403-05 · Official waterbody report

Nearby Lakes in Genesee County

Holloway Reservoir, S1 miView →Sister Lakes5 miView →Hasley Lake—View →C S Mott Lake—View →C S Mott Lake—View →Buell Lake—View →

Frequently asked questions about Holloway Reservoir

Where is Holloway Reservoir?: Holloway Reservoir is a lake in Genesee County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Holloway Reservoir?: Holloway Reservoir in Genesee County, Michigan has water-quality measurements published by EGLE, shown here as reported. Maximum depth: 25 ft. Surface area: 1173.7 acres.
Is Holloway Reservoir safe to swim in?: Nutrient and algae readings are not a swimming clearance. Holloway Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), pFAS, pCBs. Check local advisories before you swim.
How deep is Holloway Reservoir?: Holloway Reservoir has a maximum depth of 25 feet and an average depth of 10 feet. The lake covers 1173.7 acres.
Are there boat ramps on Holloway Reservoir?: Holloway Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Holloway Reservoir Regional Park. Public access is listed as yes.
Can I fish at Holloway Reservoir?: Holloway Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Michigan's fish and wildlife agency, so check its current regulations before you go.