Boyd Lake
Larimer County, Colorado1,747 acresView mapDirections
Colorado WQCD publishes the water-quality measurements for Boyd Lake. Here is what has been measured.
- Mesotrophic
- Public access
- Limited data
Boyd Lake in Larimer County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Water clarity: 4.6 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 5.1 µg/L. Surface area: 1747 acres.
Boyd Lake is a 1,747-acre mesotrophic lake in Larimer County, Colorado. Limited fish-species data available. Public access is available with 2 public boat landings. Compared to the 8 other monitored lakes in Larimer County, Boyd Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, CDPHE, last sampled 2021-09-08. Methodology: how these readings are compared.
Boyd Lake covers about 1,700 acres in Larimer County. It has 2 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 Boyd Lake on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
What Boyd Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
- Big water1,747 acres
Swimming conditions
Readings onlyLimited data
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. Check local advisories before you swim.
Whether Boyd Lake is safe to swim in today is a call for the Water Quality Control Division of the Colorado Department of Public Health and Environment and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Boyd Lake
These are the measurements Colorado WQCD publishes for Boyd Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4.6 ft. Phosphorus 20 µg/L. Chlorophyll-a 5.1 µg/L. TSI 50.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 20µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 5.1µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 50 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Boyd Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
1,747 acres
Public access
Yes
Listed by Colorado WQCD
No bathymetric survey has been published for Boyd Lake, so its depth is not documented here.
Recreation & Access
- Boyd Lake State ParkPublic
- Boyd Lake State ParkPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Boyd Lake
Compare lakeside cabins, hotels, and vacation rentals near Boyd Lake in Larimer County, Colorado — 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 Boyd Lake
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Planning a trip? Cabins and lodging at Boyd Lake → · more Colorado lake trips
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Fishing Boyd Lake
Reservoir Info (USACE NID)
Boyd Lake is a man-made reservoir impounded by the Boyd Lake (completed 1900), built primarily for fish and wildlife pond on the Big Thompson River-Os; earth-type dam, 40 ft tall and 10,729 ft long.
- Surface area
- 1,747 ac
- Normal storage
- 48,871 ac-ft
- Max storage
- 59,981 ac-ft
- Drainage area
- 17 sq mi
- Hazard class
- High
- Owner
- GREELEY-LOVELAND IRRIGATION COMPANY (DAN KAMMERZEL
All listed purposes: Fish and Wildlife Pond;Irrigation;Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID CO00157 · Operator website
Nearby Lakes in Larimer County
Frequently asked questions about Boyd Lake
Where is Boyd Lake?
- Boyd Lake is a lake in Larimer County, Colorado. Its water-quality measurements are published by Colorado WQCD and shown on this page as reported.
What is the water quality of Boyd Lake?
- Boyd Lake in Larimer County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Water clarity: 4.6 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 5.1 µg/L. Surface area: 1747 acres.
Is Boyd Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Boyd Lake?
- Boyd Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Boyd Lake State Park, Boyd Lake State Park. Public access is listed as yes.
Can I fish at Boyd Lake?
- Boyd Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Colorado's fish and wildlife agency, so check its current regulations before you go.
Explore Boyd Lake across LakeQuality
12.2 mi away · cable-pulled, no boat wake
Species activity outlook by water temperature and season
Where to stay at Colorado's top lakes, each with its readings
Colorado's cleanest lakes, ranked on agency measurements
Planning a trip around Rocky Mountain?
Boyd Lake is about 35 miles from Rocky Mountain National Park. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Rocky Mountain →More lakes in Colorado
Other Lakes in Colorado
Mesotrophic Lakes in Colorado
Where this data comes from
12 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Colorado Dept. of Public Health & Environment-WQCD
21COL001_WQX12 samples · 2021
Analytical methods
- Secchi disk depth measurement
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- Nitrogen in Water by Pyrolysis Detection
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
Named boat-access points from the USGS National Boat Ramps inventory