Lake Red Rock
Lake Red Rock in Marion County, Iowa is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 8619 acres.
- Area
- 8,619 acres
- Public access
- Yes
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Why Lake Red Rock has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Lake Red Rock, no water-quality sampling on record for this lake.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Iowa DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Red Rock is a 8,619-acre lake in Marion County, Iowa. Limited fish-species data available. Public access is available with 3 public boat landings.
Source: EPA Water Quality Portal sampling records, Iowa DNR, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Lake Red Rock water quality
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Lake Red Rock
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Lake Red Rock
Compare lakeside cabins, hotels, and vacation rentals near Lake Red Rock in Marion County, Iowa — 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 Red Rock
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 8,619 acres |
| Public Access | Yes |
No bathymetric survey has been published for Lake Red Rock, so its depth is not documented here.
Recreation & Access
- CordovaPublic
- Elk Rock A AccessPublic
- Elk Rock B AccessPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Red Rock
Nearby Lakes in Marion County
Frequently asked questions about Lake Red Rock
Where is Lake Red Rock?
- Lake Red Rock is a lake in Marion County, Iowa. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Lake Red Rock?
- Lake Red Rock in Marion County, Iowa is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 8619 acres.
Is Lake Red Rock safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Lake Red Rock is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Lake Red Rock?
- Lake Red Rock has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Cordova, Elk Rock A Access, Elk Rock B Access. Public access is listed as yes.
Explore Lake Red Rock across LakeQuality
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Where this data comes from
Measurements for Lake Red Rock come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory