Clark Reservoir
Clark Reservoir in Larimer County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 184 acres.
- Area
- 184 acres
Next lake in Larimer County
Swipe left or right on this bar to open the next or previous lake.
Why Clark Reservoir 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 Clark Reservoir, 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 CDPHE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Clark Reservoir is a 184-acre lake in Larimer County, Colorado.
Source: EPA Water Quality Portal sampling records, CDPHE, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Clark Reservoir water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Clark Reservoir
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 Clark Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Clark Reservoir 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 Clark Reservoir
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 whole trip? See where to stay at Colorado’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 184 acres |
No bathymetric survey has been published for Clark Reservoir, so its depth is not documented here.
Fishing Clark Reservoir
Nearby Lakes in Larimer County
Frequently asked questions about Clark Reservoir
Where is Clark Reservoir?
- Clark Reservoir is a lake in Larimer County, Colorado. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Clark Reservoir?
- Clark Reservoir in Larimer County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 184 acres.
Is Clark Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Clark Reservoir is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Clark Reservoir across LakeQuality
More Colorado Lake Rankings
Other Lakes in Colorado
Where this data comes from
Measurements for Clark Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.