Red Lake: toxic algae advisories
Red Lake, Alpine County. See all Alpine County waters.
What the state's records say
Warning advisory, last posted Oct 16, 2026. No all-clear recorded.
4 reported spots here have an advisory with 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: Toxins may be at levels that can harm people and animals. Do not swim or let children or pets in the water, and stay away from scum.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at Red Lake
The state has an advisory on file for Red Lake (Warning advisory), last posted Oct 16, 2026, 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 |
|---|---|
| Shoreline Point 2 (633RLS02) | Caution advisory, last posted Oct 16, 2026. No all-clear recorded. |
| Shoreline Point 1 (633RLS01) | Caution advisory, last posted Oct 16, 2026. No all-clear recorded. |
| Shoreline Point 3 (633RLS03) | Caution advisory, last posted Jul 26, 2024. No all-clear recorded. |
| Red Lake Shoreline Near Spillway on Dam End | The state's latest record, from Nov 10, 2022, recommends no advisory. |
| Shoreline Point 1 (633RLS01) | The state's latest record, from Oct 6, 2022, recommends no advisory. |
| Spot not described | The state's latest record, from Jun 25, 2021, recommends no advisory. |
| Red Lake, Hwy 88 Carson Pass | Warning advisory, last posted Nov 3, 2020. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Red Lake, 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 |
|---|---|---|---|
| Oct 16, 2026 | Shoreline Point 2 (633RLS02) | Caution | Advisory based on visual and toxins |
| Oct 16, 2026 | Shoreline Point 1 (633RLS01) | Caution | Advisory based on visual and toxins |
| Aug 21, 2026 | Shoreline Point 1 (633RLS01) | None | Advisory based on visual and toxins |
| Aug 21, 2026 | Shoreline Point 2 (633RLS02) | None | Advisory based on visual and toxins |
| Aug 21, 2026 | Shoreline Point 1 (633RLS01) | None | Advisory based on visual and toxins |
| Aug 21, 2026 | Shoreline Point 2 (633RLS02) | None | Advisory based on visual and toxins |
| Jun 19, 2026 | Shoreline Point 2 (633RLS02) | None | Advisory based on visual and toxins |
| Jun 19, 2026 | Shoreline Point 1 (633RLS01) | None | Advisory based on visual and toxins |
| Oct 29, 2025 | Shoreline Point 2 (633RLS02) | None | Testing results below posting triggers |
| Oct 29, 2025 | Shoreline Point 1 (633RLS01) | None | Testing results below posting triggers |
| Aug 25, 2025 | Shoreline Point 2 (633RLS02) | None | Testing results below posting triggers |
| Aug 25, 2025 | Shoreline Point 1 (633RLS01) | None | Testing results below posting triggers |
| Jun 25, 2025 | Shoreline Point 2 (633RLS02) | None | Testing results below posting triggers |
| Jun 25, 2025 | Shoreline Point 1 (633RLS01) | None | Testing results below posting triggers |
| Nov 4, 2024 | Shoreline Point 2 (633RLS02) | Visual observation | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Nov 4, 2024 | Shoreline Point 1 (633RLS01) | Visual observation | Updates from routine monitoring program-organization |
| Nov 4, 2024 | Shoreline Point 1 (633RLS01) | None | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 3, 2024 | Shoreline Point 2 (633RLS02) | Visual observation | Updates from routine monitoring program-organization; visual monitoring based advisory; Visual monitoring only-present bloom |
| Oct 3, 2024 | Shoreline Point 1 (633RLS01) | Visual observation | Updates from routine monitoring program-organization; visual monitoring based advisory; Visual monitoring only-present bloom |
| Aug 22, 2024 | Shoreline Point 1 (633RLS01) | Caution | Updates from routine monitoring program-organization; visual monitoring based advisory; Visual monitoring only-present bloom |
| Aug 22, 2024 | Shoreline Point 2 (633RLS02) | Caution | Updates from routine monitoring program-organization; visual monitoring based advisory; Visual monitoring only-present bloom |
| Aug 22, 2024 | Shoreline Point 1 (633RLS01) | Caution | Updates from routine monitoring program-organization; visual monitoring based advisory; Visual monitoring only-present bloom |
| Jul 26, 2024 | Shoreline Point 3 (633RLS03) | Caution | Updates from routine monitoring program-organization; Visual monitoring only-present bloom |
| Jul 26, 2024 | Shoreline Point 2 (633RLS02) | Caution | Updates from routine monitoring program-organization; visual monitoring based advisory; Visual monitoring only-present bloom |
| Jul 26, 2024 | Shoreline Point 1 (633RLS01) | Caution | Updates from routine monitoring program-organization; visual monitoring based advisory; Visual monitoring only-present bloom |
| Jul 19, 2024 | Shoreline Point 2 (633RLS02) | None | Updates from routine monitoring program-organization; visual monitoring based advisory; Visual monitoring only-present bloom |
| Jul 19, 2024 | Shoreline Point 1 (633RLS01) | Caution | Updates from routine monitoring program-organization; visual monitoring based advisory; Visual monitoring only-present bloom |
| Jun 27, 2024 | Shoreline Point 2 (633RLS02) | None | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Jun 27, 2024 | Shoreline Point 1 (633RLS01) | None | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Nov 2, 2023 | Shoreline Point 2 (633RLS02) | None | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Nov 2, 2023 | Shoreline Point 1 (633RLS01) | None | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 6, 2023 | Shoreline Point 1 (633RLS01) | None | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 6, 2023 | Shoreline Point 2 (633RLS02) | None | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 6, 2023 | Shoreline Point 1 (633RLS01) | None | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 6, 2023 | Shoreline Point 2 (633RLS02) | Visual observation | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 6, 2023 | Shoreline Point 1 (633RLS01) | Visual observation | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Aug 28, 2023 | Shoreline Point 1 (633RLS01) | Visual observation | Suspected bloom, investigation ongoing; Updates from routine monitoring program-organization |
| Aug 28, 2023 | Shoreline Point 1 (633RLS01) | Visual observation | Suspected bloom, investigation ongoing; Updates from routine monitoring program-organization |
| Aug 1, 2023 | Shoreline Point 2 (633RLS02) | None | Updates from routine monitoring program-organization |
| Aug 1, 2023 | Shoreline Point 1 (633RLS01) | None | Updates from routine monitoring program-organization |
| Aug 1, 2023 | Shoreline Point 1 (633RLS01) | None | Updates from routine monitoring program-organization |
| Jul 5, 2023 | Shoreline Point 1 (633RLS01) | None | Updates from routine monitoring program-organization |
| Jun 23, 2023 | Shoreline Point 1 (633RLS01) | NA - refer to Report Details | Under investigation |
| Nov 10, 2022 | Red Lake Shoreline Near Spillway on Dam End | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Oct 6, 2022 | Shoreline Point 1 (633RLS01) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Oct 6, 2022 | Shoreline Point 1 (633RLS01) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Oct 6, 2022 | Shoreline Point 1 (633RLS01) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Oct 6, 2022 | Red Lake Shoreline Near Spillway on Dam End | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 24, 2022 | Shoreline Point 1 (633RLS01) | None | Testing results below posting triggers |
| Aug 17, 2022 | Shoreline Point 1 (633RLS01) | Caution | visual monitoring based advisory |
| Aug 17, 2022 | Shoreline Point 1 (633RLS01) | Caution | visual monitoring based advisory |
| Aug 17, 2022 | Shoreline Point 1 (633RLS01) | None | visual monitoring based advisory |
| Jul 28, 2022 | Shoreline Point 1 (633RLS01) | None | Testing results below posting triggers |
| Jun 23, 2022 | Shoreline Point 1 (633RLS01) | None | No cyano bloom w/testing |
| May 20, 2022 | Shoreline Point 1 (633RLS01) | None | No cyano bloom w/testing |
| Jun 25, 2021 | Spot not described | None | Testing results below posting triggers |
| Nov 3, 2020 | Red Lake, Hwy 88 Carson Pass | Warning | Advisory based on visual and toxins |
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.