Where is Trillium Lake?

Trillium Lake is a lake in Clackamas County, Oregon. Its water-quality measurements are published by Oregon DEQ and shown on this page as reported.

How deep is Trillium Lake?

Trillium Lake has a maximum depth of 21 feet and an average depth of 7 feet. The lake covers 58 acres.

Are there boat ramps on Trillium Lake?

Trillium Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Trillium Lake Camp. Public access is listed as yes.

Can I fish at Trillium Lake?

Trillium Lake 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 Oregon's fish and wildlife agency, so check its current regulations before you go.

Are there campgrounds on Trillium Lake?

Trillium Lake has 3 public campgrounds from USGS The National Map within 5 km, including Trillium Lake Campground, Trillium, Still Creek. 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.

Trillium Lake

Clackamas County, Oregon58 acresView map Directions

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

Max depth

21 ft

Bathymetric survey

Area

58 acres

Surface area

Shoreline

1.9 mi

Measured length

21 ft max depth
Public access

See the measurements Directions Where to stay

Trillium Lake in Clackamas County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Maximum depth: 21 ft. Surface area: 58 acres.

Loading map…

Trillium Lake is a 58-acre lake in Clackamas County, Oregon with a maximum depth of 21 feet (7-foot average). Limited fish-species data available. Public access is available with 1 public boat landing.

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

What Trillium Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Camping3 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 Trillium Lake is safe to swim in today is a call for the Oregon Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

Get alerts for Trillium Lake →

Water quality measurements for Trillium Lake

These are the measurements Oregon DEQ publishes for Trillium 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 Trillium Lake

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

Lake Details

Max depth

21 ft

Average depth

7 ft

Surface area

58 acres

Shoreline

1.9 mi

Public access

Yes

Listed by Oregon DEQ

Recreation & Access

Boat Landings

Yes

Public Access

Campgrounds

Trillium Lake CampPublic

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

Public campgrounds near Trillium Lake

Trillium Lake Campground0.3 km
Trillium0.3 kmReserve
Still Creek3.3 kmReserve

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 Trillium Lake

Compare lakeside cabins, hotels, and vacation rentals near Trillium Lake in Clackamas County, Oregon — 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 Trillium 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.

Planning a whole trip? See where to stay at Oregon’s top lakes →

Follow Trillium Lake’s readings

Email me when new measurements post for this lake. Updates stay free.

Or email

Fishing Trillium Lake

→ Trillium Lake fishing regulations (limits, seasons, special rules)

Nearby Lakes in Clackamas County

Timothy LakeOligotrophic11.2 miView →Bull Run Lake13.4 miView →North Fork Reservoir—View →North Fork Reservoir—View →Faraday Lake—View →Estacada Lake—View →

Frequently asked questions about Trillium Lake

Where is Trillium Lake?: Trillium Lake is a lake in Clackamas County, Oregon. Its water-quality measurements are published by Oregon DEQ and shown on this page as reported.
What is the water quality of Trillium Lake?: Trillium Lake in Clackamas County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Maximum depth: 21 ft. Surface area: 58 acres.
Is Trillium Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Trillium Lake?: Trillium Lake has a maximum depth of 21 feet and an average depth of 7 feet. The lake covers 58 acres.
Are there boat ramps on Trillium Lake?: Trillium Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Trillium Lake Camp. Public access is listed as yes.
Can I fish at Trillium Lake?: Trillium Lake 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 Oregon's fish and wildlife agency, so check its current regulations before you go.
Are there campgrounds on Trillium Lake?: Trillium Lake has 3 public campgrounds from USGS The National Map within 5 km, including Trillium Lake Campground, Trillium, Still Creek. 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.