Lake Bomoseen
Rutland County, Vermont2,360 acresView mapDirections
Vermont DEC publishes the water-quality measurements for Lake Bomoseen. Here is what has been measured.
- Oligotrophic
- 73 ft max depth
- Public access
Lake Bomoseen in Rutland County, Vermont has water-quality measurements published by Vermont DEC, shown here as reported. Water clarity: 23.6 ft visibility. Phosphorus: 9.7 µg/L. Chlorophyll-a (algae): 1.2 µg/L. Surface area: 2360 acres.
Lake Bomoseen is a 2,360-acre cold, clear oligotrophic lake in Rutland County, Vermont with an estimated average depth of about 73 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 14 other monitored lakes in Rutland County, Lake Bomoseen ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, VT DEC, last sampled 2025-07-26. Methodology: how these readings are compared.
Lake Bomoseen covers about 2,400 acres in Rutland County. It has one public boat landing. For a place on the water, look through cabin and lake-house rentals near Lake Bomoseen on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
What Lake Bomoseen is good for
From access and monitoring records, not editorial picks.
- Clear water23.6 ft of visibility
- Boat launch1 documented ramp
- Big water2,360 acres
Swimming conditions
Readings onlyLow algae
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 Lake Bomoseen is safe to swim in today is a call for the Vermont Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Bomoseen
These are the measurements Vermont DEC publishes for Lake Bomoseen, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 23.6 ft down. Phosphorus 9.7 µg/L. Chlorophyll-a 1.2 µg/L. TSI 34.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 23.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 9.7µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 1.2µg/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. | 34 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Lake Bomoseen
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~73 ft est.
Surface area
2,360 acres
Public access
Yes
Listed by Vermont DEC
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Vermont has not published bathymetry for Lake Bomoseen.
Lake Size & Watershed
Watershed (drainage) area
36 sq mi
HydroLAKES / HydroSHEDS
Shoreline
19.3 mi
HydroLAKES / HydroSHEDS
Elevation
410 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
- KehoePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Lake Bomoseen
Compare lakeside cabins, hotels, and vacation rentals near Lake Bomoseen in Rutland County, Vermont — 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 Lake Bomoseen
Prices for Oct 23–25, 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 Lake Bomoseen → · more Vermont lake trips
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Fishing Lake Bomoseen
Water Quality Trend: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening2 years
Phosphorus
Improving-0.76 µg/L/yr5 years
Chlorophyll-a
Worsening+0.11 µg/L/yr4 years
Reservoir Info (USACE NID)
Lake Bomoseen is a man-made reservoir impounded by the Lake Bomoseen (completed 1850), built primarily for recreation on the Castleton River-Tr; concrete-type dam, 14 ft tall and 45 ft long.
- Surface area
- 2,360 ac
- Normal storage
- 0 ac-ft
- Max storage
- 10,310 ac-ft
- Drainage area
- 37 sq mi
- Hazard class
- Low
- Owner
- STATE OF VERMONT - DEC
Source: USACE National Inventory of Dams, NID ID VT00177 · Operator website
Nearby Lakes in Rutland County
Frequently asked questions about Lake Bomoseen
Where is Lake Bomoseen?
- Lake Bomoseen is a lake in Rutland County, Vermont. Its water-quality measurements are published by Vermont DEC and shown on this page as reported.
What is the water quality of Lake Bomoseen?
- Lake Bomoseen in Rutland County, Vermont has water-quality measurements published by Vermont DEC, shown here as reported. Water clarity: 23.6 ft visibility. Phosphorus: 9.7 µg/L. Chlorophyll-a (algae): 1.2 µg/L. Surface area: 2360 acres.
Is Lake Bomoseen safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Lake Bomoseen?
- No published bathymetric survey covers Lake Bomoseen, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 73 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 2360 acres.
Are there boat ramps on Lake Bomoseen?
- Lake Bomoseen has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Kehoe. Public access is listed as yes.
Can I fish at Lake Bomoseen?
- Lake Bomoseen 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 Vermont's fish and wildlife agency, so check its current regulations before you go.
Explore Lake Bomoseen across LakeQuality
Depth, room, public access, and the state wake-sport rules
Species activity outlook by water temperature and season
Where to stay at Vermont's top lakes, each with its readings
Vermont's cleanest lakes, ranked on agency measurements
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Oligotrophic Lakes in Vermont
Where this data comes from
73 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Vermont Dept of Environmental Conservation
1VTDECWQ73 samples · 2020–2025
Analytical methods
- EPA approved Alternate Test Procedure for 4500 P H. Has a 28 day hold without acid preservation.
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- 2130 B ~ Nephelometric Method
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory