Where is Tenmile Lake?

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

How deep is Tenmile Lake?

No published bathymetric survey covers Tenmile Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 321 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.

Are there boat ramps on Tenmile Lake?

Tenmile Lake has 7 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Spinreel Campground, Tenmile Lake Park, 8th Street, South 8th Street, among others. Public access is listed as yes.

Can I fish at Tenmile Lake?

Tenmile Lake has 7 documented boat landings 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 Tenmile Lake?

Tenmile Lake has 3 public campgrounds from USGS The National Map within 5 km, including Eel Creek Campground, Spinreel, Spinreel Sand Camping. 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.

Tenmile Lake

Coos County, OregonView map Directions

Oregon DEQ publishes the water-quality measurements for Tenmile Lake. Here is what has been measured.

Chlorophyll-a

30.6 µg/L

More algae than most

Measured by Oregon DEQ

Max depth

~321 ft est.

GLOBathy model

Type

Hypereutrophic

Trophic class

Hypereutrophic
Impaired · Algal growth
321 ft max depth
Public access
Limited data

See the measurements Directions Where to stay

Tenmile Lake in Coos County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Chlorophyll-a (algae): 30.6 µg/L.

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Tenmile Lake is a highly nutrient-loaded hypereutrophic lake in Coos County, Oregon with an estimated average depth of about 321 feet. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 7 public boat landings.

Source: EPA Water Quality Portal sampling records, Oregon DEQ, last sampled 2025-10-16. Methodology: how these readings are compared.

Tenmile Lake has 7 public boat landings, so a lakefront rental is not the only way to get a boat on the water. For a place on the water, look through cabin and lake-house rentals near Tenmile Lake on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.

What Tenmile Lake is good for

From access and monitoring records, not editorial picks.

Boat launch7 documented ramps
Camping3 public campgrounds nearby

Swimming conditions

Readings only

Recreation use not supported

Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.

Nutrient and algae readings are not a swimming clearance. Tenmile Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, oxygen depletion (low DO). Check local advisories before you swim.

Whether Tenmile 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 Tenmile Lake →

Water quality measurements for Tenmile Lake

These are the measurements Oregon DEQ publishes for Tenmile 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. Chlorophyll-a 30.6 µg/L. TSI 64.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)		No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus		No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	30.6µg/L	Poor GoodFairPoor
Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a.	64	Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic

Very high nutrients, dense algae, poor clarity

Ask about Tenmile Lake

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

Lake Details

Max depth

~321 ft est.

Public access

Yes

Listed by Oregon DEQ

Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Oregon has not published bathymetry for Tenmile Lake.

Lake Size & Watershed

Watershed (drainage) area

80 sq mi

HydroLAKES / HydroSHEDS

Surface area

937 acres

HydroLAKES / HydroSHEDS

Shoreline

19.1 mi

HydroLAKES / HydroSHEDS

Elevation

16 ft

Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.

Recreation & Access

Boat Landings

Yes

Public Access

Campgrounds

Spinreel CampgroundPublic
Tenmile Lake ParkPublic
8th StreetPublic
South 8th StreetPublic
Osprey Point ResortSemi-private
La PlayaSemi-private

Showing 6 of 7 documented landings from the USGS National Boat Ramps inventory.

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

Public campgrounds near Tenmile Lake

Eel Creek Campground2.2 kmReserve
Spinreel2.7 kmReserve
Spinreel Sand Camping2.8 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 Tenmile Lake

Compare lakeside cabins, hotels, and vacation rentals near Tenmile Lake in Coos 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Tenmile Lake are listed below.

Top-rated places to stay near Tenmile Lake

Prices for Oct 30–Nov 1, 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 trip? Cabins and lodging at Tenmile Lake → · more Oregon lake trips

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Fishing Tenmile Lake

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

Water quality readings over time

2 seasons of samples on record (2024–2025). Calling a direction takes at least 4 years of the same measurement.

Chlorophyll-a
Improving
-4.6 µg/L/yr2 years

EPA Impairment Status

Tenmile Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).

Causes of impairment

Algal growthMercuryOxygen depletion (low DO)

Designated uses not supporting: Drinking water, Aquatic life, Fish consumption, Recreation, Other.

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

Source: EPA ATTAINS assessment unit OR_LK_1710030404_02_100224 · Official waterbody report

Nearby Lakes in Coos County

North Tenmile Lake4.9 ft clear1.8 miView →Tenmile Lake—View →Saunders Lake—View →Beale Lake—View →Snag Lake—View →Sandpoint Lake—View →

Frequently asked questions about Tenmile Lake

Where is Tenmile Lake?: Tenmile Lake is a lake in Coos County, Oregon. Its water-quality measurements are published by Oregon DEQ and shown on this page as reported.
What is the water quality of Tenmile Lake?: Tenmile Lake in Coos County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Chlorophyll-a (algae): 30.6 µg/L.
Is Tenmile Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Tenmile Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, oxygen depletion (low DO). Check local advisories before you swim.
How deep is Tenmile Lake?: No published bathymetric survey covers Tenmile Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 321 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there boat ramps on Tenmile Lake?: Tenmile Lake has 7 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Spinreel Campground, Tenmile Lake Park, 8th Street, South 8th Street, among others. Public access is listed as yes.
Can I fish at Tenmile Lake?: Tenmile Lake has 7 documented boat landings 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 Tenmile Lake?: Tenmile Lake has 3 public campgrounds from USGS The National Map within 5 km, including Eel Creek Campground, Spinreel, Spinreel Sand Camping. 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.

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Where this data comes from

8 measurements from 1 monitoring station, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

Department of Environmental Quality - State of OregonOREGONDEQ8 samples · 2024–2025

Analytical methods

10200 H ~ Chlorophyll a-b-c Determination

Monitoring station identifiers (1)

OREGONDEQ-14029-ORDEQ

EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.