Fremont Bridge Lake
Klamath County, Oregon85,000 acresView mapDirections
Oregon DEQ publishes the water-quality measurements for Fremont Bridge Lake. Here is what has been measured.
- Hypereutrophic
- Impaired · Algal growth
- Public access
Fremont Bridge Lake in Klamath County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Phosphorus: 200 µg/L. Surface area: 85000 acres.
Fremont Bridge Lake is a 85,000-acre highly nutrient-loaded hypereutrophic lake in Klamath County, Oregon. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 5 public boat landings. Compared to the 16 other monitored lakes in Klamath County, Fremont Bridge Lake ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, Oregon DEQ, last sampled 2024-03-04. Methodology: how these readings are compared.
What Fremont Bridge Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch5 documented ramps
- Big water85,000 acres
Swimming conditions
Readings onlyRecreation 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. Fremont Bridge Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, oxygen depletion (low DO), pH / acidity, sediment / turbidity, temperature. Check local advisories before you swim.
Whether Fremont Bridge 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.
Water quality measurements for Fremont Bridge Lake
These are the measurements Oregon DEQ publishes for Fremont Bridge 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. Phosphorus 200 µg/L. TSI 81.
| 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 | 200µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 81 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Fremont Bridge Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
85,000 acres
Public access
Yes
Listed by Oregon DEQ
No bathymetric survey has been published for Fremont Bridge Lake, so its depth is not documented here.
Recreation & Access
- Miller IslandPublic
- Veteran's Memorial ParkPublic
- Moore Park Marina #2Public
- Moore Park Marina #1Public
- Pelican MarinaSemi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Fremont Bridge Lake
Compare lakeside cabins, hotels, and vacation rentals near Fremont Bridge Lake in Klamath 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 Fremont Bridge Lake are listed below.
Top-rated places to stay near Fremont Bridge 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 Fremont Bridge Lake → · more Oregon lake trips
Follow Fremont Bridge Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Fremont Bridge Lake
Water Quality Trend: Improving
Based on 5 years of monitoring (2020–2023).
Phosphorus
Improving-42.5 µg/L/yr4 years
Reservoir Info (USACE NID)
Fremont Bridge Lake is a man-made reservoir impounded by the Link River Diversion Dam (completed 1921), built primarily for hydroelectric on the Klamath River, Link River; concrete-type dam, 22 ft tall and 435 ft long.
- Surface area
- 85,000 ac
- Normal storage
- 735,000 ac-ft
- Max storage
- 735,000 ac-ft
- Drainage area
- 3,800 sq mi
- Hazard class
- High
- Owner
- BUREAU OF RECLAMATION
All listed purposes: Hydroelectric;Irrigation;Recreation.
Source: USACE National Inventory of Dams, NID ID OR00557 · Operator website · Matched by proximity (0.64 km)
EPA Impairment Status
Fremont Bridge Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
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_1801020303_05_100375 · Official waterbody report
Nearby Lakes in Klamath County
Frequently asked questions about Fremont Bridge Lake
Where is Fremont Bridge Lake?
- Fremont Bridge Lake is a lake in Klamath County, Oregon. Its water-quality measurements are published by Oregon DEQ and shown on this page as reported.
What is the water quality of Fremont Bridge Lake?
- Fremont Bridge Lake in Klamath County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Phosphorus: 200 µg/L. Surface area: 85000 acres.
Is Fremont Bridge Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Fremont Bridge Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, oxygen depletion (low DO), pH / acidity, sediment / turbidity, temperature. Check local advisories before you swim.
Are there boat ramps on Fremont Bridge Lake?
- Fremont Bridge Lake has 5 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Miller Island, Veteran's Memorial Park, Moore Park Marina #2, Moore Park Marina #1, among others. Public access is listed as yes.
Can I fish at Fremont Bridge Lake?
- Fremont Bridge Lake has 5 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.
Explore Fremont Bridge Lake across LakeQuality
4 thermal springs within 10.7 mi, nearest Hardboard Spring
Species activity outlook by water temperature and season
Where to stay at Oregon's top lakes, each with its readings
Oregon's cleanest lakes, ranked on agency measurements
More lakes in Oregon
Other Lakes in Oregon
Hypereutrophic Lakes in Oregon
Where this data comes from
395 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- USGS Oregon Water Science Center
USGS-OR395 samples · 2020–2024
Analytical methods
- Nutrients, wu, WCA,persulfate,CF
- YSI EXO turbidity sensor, FNU
Monitoring station identifiers (1)
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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory