Where is Big Trinity Lake?

Big Trinity Lake is a lake in Elmore County, Idaho. Its water-quality measurements are published by Idaho DEQ and shown on this page as reported.

Are there campgrounds on Big Trinity Lake?

Big Trinity Lake has 4 public campgrounds from USGS The National Map within 5 km, including Big Trinity Lake Campground, Big Trinity Cabin, Little Roaring River Lake Campground, Big Roaring River Lake 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.

Big Trinity Lake

Elmore County, Idaho26 acresView map Directions

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

Area

26 acres

Surface area

Shoreline

1 mi

Measured length

See the measurements Directions Where to stay

Big Trinity Lake in Elmore County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 26 acres.

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Big Trinity Lake is a 26-acre lake in Elmore County, Idaho.

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

What Big Trinity Lake is good for

From access and monitoring records, not editorial picks.

Camping4 public campgrounds nearby

Swimming conditions

No reading

Not rated

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

Whether Big Trinity Lake 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.

Get alerts for Big Trinity Lake →

Water quality measurements for Big Trinity Lake

These are the measurements Idaho DEQ publishes for Big Trinity Lake, 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 Big Trinity Lake

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

Lake Details

Surface area

26 acres

Shoreline

1 mi

No bathymetric survey has been published for Big Trinity Lake, so its depth is not documented here.

Recreation & Access

Campgrounds

Public campgrounds near Big Trinity Lake

Big Trinity Lake Campground0.4 km
Big Trinity Cabin0.9 kmReserve
Little Roaring River Lake Campground1.2 km
Big Roaring River Lake Campground1.3 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 Big Trinity Lake

Compare lakeside cabins, hotels, and vacation rentals near Big Trinity Lake in Elmore 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 Big Trinity Lake

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

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

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Follow Big Trinity Lake’s readings

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Fishing Big Trinity Lake

→ Big Trinity Lake fishing regulations (limits, seasons, special rules)

Nearby Lakes in Elmore County

Cat Creek Reference Lake16.3 miView →Little Camas Reservoir20.1 miView →Long Tom Reservoir—View →Arrowrock Reservoir12.5 ft clear20.2 miView →Cow Creek Reservoir—View →Spangle Lake—View →

Frequently asked questions about Big Trinity Lake

Where is Big Trinity Lake?: Big Trinity Lake is a lake in Elmore County, Idaho. Its water-quality measurements are published by Idaho DEQ and shown on this page as reported.
What is the water quality of Big Trinity Lake?: Big Trinity Lake in Elmore County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 26 acres.
Is Big Trinity Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there campgrounds on Big Trinity Lake?: Big Trinity Lake has 4 public campgrounds from USGS The National Map within 5 km, including Big Trinity Lake Campground, Big Trinity Cabin, Little Roaring River Lake Campground, Big Roaring River Lake 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.