Grizzly Reservoir
Grizzly Reservoir in Pitkin County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 31 acres.
- Area
- 31 acres
Next lake in Pitkin County
Swipe left or right on this bar to open the next or previous lake.
Why Grizzly 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 Grizzly 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.
Grizzly Reservoir is a 31-acre lake in Pitkin County, Colorado.
Source: EPA Water Quality Portal sampling records, CDPHE, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Grizzly 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 Grizzly 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 Grizzly Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Grizzly Reservoir in Pitkin 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 Grizzly 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 | 31 acres |
No bathymetric survey has been published for Grizzly Reservoir, so its depth is not documented here.
Fishing Grizzly Reservoir
Nearby Lakes in Pitkin County
Frequently asked questions about Grizzly Reservoir
Where is Grizzly Reservoir?
- Grizzly Reservoir is a lake in Pitkin 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 Grizzly Reservoir?
- Grizzly Reservoir in Pitkin County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 31 acres.
Is Grizzly Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Grizzly 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 Grizzly Reservoir across LakeQuality
More Colorado Lake Rankings
Other Lakes in Colorado
Where this data comes from
Measurements for Grizzly Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.