Red Lake Creek: toxic algae advisories
Red Lake Creek, Alpine County. See all Alpine County waters.
What the state's records say
Algal mat alert sign, last posted Sep 5, 2025. No all-clear recorded.
Reporting is voluntary, so the state may not have recorded an end even if conditions changed. Check posted signs and the official map.
What this level asks: The state recorded an advisory of a type outside the Caution, Warning and Danger levels. Read the sign posted at the water.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at Red Lake Creek
The state has an advisory on file for Red Lake Creek (Algal mat alert sign), last posted Sep 5, 2025, and no all-clear recorded. Keep your dog out of the water and away from scum on the shore until the state records an end.
Reported spots
The state records each report at a spot, such as a beach or a boat ramp. Each spot's latest deciding record:
| Spot | Status |
|---|---|
| Red Lake Cr, below HWY (633RDL001) | Algal mat alert sign, last posted Sep 5, 2025. No all-clear recorded. |
| Red Lake Creek Nearest Red Lake (633RLC05) | The state's latest record, from Nov 2, 2023, recommends no advisory. |
| Red Lake Creek Nearest Red Lake | The state's latest record, from Nov 10, 2022, recommends no advisory. |
Advisory history
Every advisory record the state has published for Red Lake Creek, newest first. "None" is the state's record that no advisory was recommended on that date. "NA" records do not change a status.
| Date | Spot | State's level | Notes |
|---|---|---|---|
| Sep 5, 2025 | Red Lake Cr, below HWY (633RDL001) | Algal mat alert sign | Updates from routine monitoring program-organization |
| Nov 2, 2023 | Red Lake Creek Nearest Red Lake (633RLC05) | None | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 6, 2023 | Red Lake Creek Nearest Red Lake (633RLC05) | None | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 6, 2023 | Red Lake Creek Nearest Red Lake (633RLC05) | Visual observation | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Aug 1, 2023 | Red Lake Creek Nearest Red Lake (633RLC05) | None | Updates from routine monitoring program-organization |
| Nov 10, 2022 | Red Lake Creek Nearest Red Lake | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Oct 6, 2022 | Red Lake Creek Nearest Red Lake | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 24, 2022 | Red Lake Creek Nearest Red Lake | None | Testing results below posting triggers |
| Jul 28, 2022 | Red Lake Creek Nearest Red Lake | None | Testing results below posting triggers |
Source
Advisory data: California State Water Resources Control Board, Freshwater Harmful Algal Bloom Program, via data.ca.gov (public domain). Advisories are recommendations; reporting is voluntary and incomplete. The state's data. An advisory ends only when the state records a later "None" (no advisory recommended) at the same spot, or an end date. A blank end date is unknown.