Where is Mackay Reservoir?

Mackay Reservoir is a lake in Custer County, Idaho. Its water-quality measurements are published by Idaho DEQ and shown on this page as reported.

Are there boat ramps on Mackay Reservoir?

Mackay Reservoir has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Mackay Reservoir - Upper, Mackay Reservoir - Middle, Mackay Reservoir - Lower. Public access is listed as yes.

Can I fish at Mackay Reservoir?

Mackay Reservoir has 3 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Idaho's fish and wildlife agency, so check its current regulations before you go.

Are there campgrounds on Mackay Reservoir?

Mackay Reservoir has 2 public campgrounds from USGS The National Map within 5 km, including Joe T. Fallini Recreation Site, Joseph T. Fallini Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.

Mackay Reservoir

Custer County, Idaho1,178 acresView map Directions

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

Area

1,178 acres

Surface area

Shoreline

8.4 mi

Measured length

Public access

See the measurements Directions Where to stay

Mackay Reservoir in Custer County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 1178 acres.

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Mackay Reservoir is a 1,178-acre lake in Custer County, Idaho. Limited fish-species data available. Public access is available with 3 public boat landings.

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

What Mackay Reservoir is good for

From access and monitoring records, not editorial picks.

Boat launch3 documented ramps
Camping2 public campgrounds nearby
Big water1,178 acres

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Mackay Reservoir is safe to swim in today is a call for the Idaho Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Mackay Reservoir

These are the measurements Idaho DEQ publishes for Mackay 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 Mackay Reservoir

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

→ Mackay Reservoir water level: the live USGS gauge reading

Lake Details

Surface area

1,178 acres

Shoreline

8.4 mi

Public access

Yes

Listed by Idaho DEQ

No bathymetric survey has been published for Mackay Reservoir, so its depth is not documented here.

Recreation & Access

Boat Landings

Yes

Public Access

Campgrounds

Mackay Reservoir - UpperPublic
Mackay Reservoir - MiddlePublic
Mackay Reservoir - LowerPublic

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

Public campgrounds near Mackay Reservoir

Joe T. Fallini Recreation Site1.4 kmReserve
Joseph T. Fallini Campground1.4 km

Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes

Stays via Stay22

Stays near Mackay Reservoir

Compare lakeside cabins, hotels, and vacation rentals near Mackay Reservoir in Custer County, Idaho — 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 Mackay Reservoir

Prices for Oct 16–18, 4 adults. Change dates on the map below.

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Planning a trip? Cabins and lodging at Mackay Reservoir → · more Idaho lake trips

Follow Mackay Reservoir’s readings

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Fishing Mackay Reservoir

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

Nearby Lakes in Custer County

Jimmy Smith Lake38.1 miView →Sullivan Lake—View →Quiet Lake—View →Mosquito Flat Reservoir—View →Yellow Belly Lake—View →Little Redfish Lake—View →

Frequently asked questions about Mackay Reservoir

Where is Mackay Reservoir?: Mackay Reservoir is a lake in Custer County, Idaho. Its water-quality measurements are published by Idaho DEQ and shown on this page as reported.
What is the water quality of Mackay Reservoir?: Mackay Reservoir in Custer County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 1178 acres.
Is Mackay Reservoir safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Mackay Reservoir?: Mackay Reservoir has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Mackay Reservoir - Upper, Mackay Reservoir - Middle, Mackay Reservoir - Lower. Public access is listed as yes.
Can I fish at Mackay Reservoir?: Mackay Reservoir has 3 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Idaho's fish and wildlife agency, so check its current regulations before you go.
Are there campgrounds on Mackay Reservoir?: Mackay Reservoir has 2 public campgrounds from USGS The National Map within 5 km, including Joe T. Fallini Recreation Site, Joseph T. Fallini Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.