Jarvis Beach Lake is a 304-acre mesotrophic lake in Rolette County, North Dakota with a maximum depth of 26 feet (10-foot average). Water quality is graded A based on 1 sampling years through 2025. Overall water quality is declining over recent sampling years. The lake supports 3 documented fish species including Northern Pike, Walleye, and Yellow Perch. Public access is available with 1 public boat landing. Compared to the 13 other monitored lakes in Rolette County, Jarvis Beach Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, North Dakota DNR, last sampled 2025-08-26. Grade methodology: LakeGrade methodology.
Watch Jarvis Beach Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Based on E. coli testing, Jarvis Beach Lake occasionally exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 7.1% of 14 samples across 3 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check North Dakota’s current beach and health-department advisories before swimming.
Water Quality Grade: A, Excellent
No clarity data. Chlorophyll-a: 4.5 µg/L. Trophic State Index: 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 4.5 µg/L | A |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 26.3 ft |
| Average Depth | 9.9 ft |
| Surface Area | 304 acres |
| Shoreline Length | 7.2 mi |
| Public Access | Yes |
Where to stay near Jarvis Beach Lake
Compare lakeside cabins, hotels, and vacation rentals near Jarvis Beach Lake in Rolette County, North Dakota — 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 Jarvis Beach Lake
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 to Jarvis Beach Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Jarvis Beach Lake — straight to your inbox. No spam, unsubscribe anytime.
Planning a whole trip? See where to stay at North Dakota’s top lakes →
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Jarvis Beach Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.01 m/yr | 5 |
| Chlorophyll-a | ↓ Declining | +0.58 µg/L/yr | 4 |
Recreation & Access
Water Temperature
Jarvis Beach Lake averages about 67°F at the surface in summer, usually warmest in Jul (about 72°F) and coldest in Apr (about 52°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 29 field readings (2010–2020) via the EPA Water Quality Portal.
Location
County Ranking
Ranked #1 of 14 lakes in Rolette County
Nearby Lakes in Rolette County
Explore Jarvis Beach Lake across LakeGrade
Fish species and top-graded lakes across North Dakota
Fish species and best lakes in Rolette County
Species activity outlook by water temperature and season
Where to stay at North Dakota's top lakes, each with its grade
Moderate nutrients, good water quality
North Dakota's cleanest and most-polluted lakes, ranked
More North Dakota Lake Rankings
Other Grade A Lakes in North Dakota
Mesotrophic Lakes in North Dakota
More records, surveys & data sources
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Depth, fish, and access data from North Dakota Game & Fish
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2025-08-26
Monitoring stations: 1