Rodeo Lagoon E Bottom Lake
Rodeo Lagoon E Bottom Lake in Marin County, California has a water quality grade of F (Algae-prone). Chlorophyll-a (algae): 40.5 µg/L.
- Type
- Hypereutrophic
- Public access
- Yes
Grade F measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Rodeo Lagoon E Bottom Lake →
Rodeo Lagoon E Bottom Lake is a highly nutrient-loaded hypereutrophic lake in Marin County, California. Water quality is graded F based on 1 sampling years through 2022. Limited fish-species data available. Public access is available with 4 public boat landings. Compared to the 2 other monitored lakes in Marin County, Rodeo Lagoon E Bottom Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-11-08. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyAlgae risk
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom
Water Quality Grade: F (Algae-prone)
No clarity data. Chlorophyll-a: 40.5 µg/L. Trophic State Index: 67.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 40.5 µg/L | Poor |
| Trophic State Index (TSI) | 67 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Rodeo Lagoon E Bottom Lake
Compare lakeside cabins, hotels, and vacation rentals near Rodeo Lagoon E Bottom Lake in Marin County, California — 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 grade measures nutrients and algae, not lodging — cabins and rentals around Rodeo Lagoon E Bottom Lake are listed below.
Top-rated places to stay near Rodeo Lagoon E Bottom Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Recreation & Access
- Travis MarinaPublic
- Turney Street BoatPublic
- Presidio Yacht ClubSemi-private
- Clipper Yacht HarborSemi-private
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fishing Rodeo Lagoon E Bottom Lake
County Ranking
Ranked #2 of 3 lakes in Marin County
Nearby Lakes in Marin County
Frequently asked questions about Rodeo Lagoon E Bottom Lake
Where is Rodeo Lagoon E Bottom Lake?
- Rodeo Lagoon E Bottom Lake is a lake in Marin County, California. LakeQuality grades it F for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Rodeo Lagoon E Bottom Lake?
- Rodeo Lagoon E Bottom Lake in Marin County, California has a water quality grade of F (Algae-prone). Chlorophyll-a (algae): 40.5 µg/L.
Is Rodeo Lagoon E Bottom Lake safe to swim in?
- Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom. Rodeo Lagoon E Bottom Lake has a water quality grade of F (Algae-prone). Algae concentration (chlorophyll-a) is 40.5 µg/L. Always check local health department advisories before swimming.
Are there boat ramps on Rodeo Lagoon E Bottom Lake?
- Rodeo Lagoon E Bottom Lake has 4 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Travis Marina, Turney Street Boat, Presidio Yacht Club, Clipper Yacht Harbor. Public access is listed as yes.
Explore Rodeo Lagoon E Bottom Lake across LakeGrade
More California Lake Rankings
Other Grade F Lakes in California
Hypereutrophic Lakes in California
Where this data comes from
19 measurements from 1 monitoring station, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- USGS California Water Science Center
USGS-CA19 samples · 2020–2022
Analytical methods
- Plant pigments, sonication & 445
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory