Gull Lake: toxic algae advisories
Gull Lake, Mono County. See all Mono County waters.
What the state's records say
The state's latest record, from Oct 7, 2026, recommends no advisory.
That reflects what the state knew on that date. It is not a finding that the water is safe now: blooms can return within days, and many are never reported.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at Gull Lake
The state's latest record, from Oct 7, 2026, recommends no advisory. For Gull Lake, that is not the same as an all-clear for today. Look at the water before your dog goes in: keep it out of green, blue-green or scummy water and away from mats on the shore.
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 |
|---|---|
| Kayak Launch | The state's latest record, from Oct 7, 2026, recommends no advisory. |
| Gull Lake kayak launch | The state's latest record, from Oct 14, 2022, recommends no advisory. |
| Spot not described | The state's latest record, from Jun 24, 2021, recommends no advisory. |
Advisory history
Every advisory record the state has published for Gull 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 7, 2026 | Kayak Launch | None | Advisory based on visual and toxins |
| Sep 2, 2026 | Kayak Launch | None | Advisory based on visual and toxins |
| Jun 18, 2026 | Kayak Launch | None | Advisory based on visual and toxins |
| Oct 23, 2025 | Kayak Launch | None | Advisory based on visual and toxins |
| Aug 29, 2025 | Kayak Launch | None | Advisory based on visual and toxins |
| Jun 25, 2025 | Kayak Launch | None | Advisory based on visual and toxins |
| Aug 22, 2024 | Kayak Launch | None | No cyano bloom w/testing; Updates from routine monitoring program-organization |
| Jun 27, 2024 | Kayak Launch | None | No cyano bloom w/testing; Updates from routine monitoring program-organization |
| Aug 22, 2023 | Kayak Launch | None | No cyano bloom w/testing; Updates from routine monitoring program-organization |
| Aug 22, 2023 | Kayak Launch | None | No cyano bloom w/testing; Updates from routine monitoring program-organization |
| Jun 27, 2023 | Kayak Launch | None | No cyano bloom w/testing; Updates from routine monitoring program-organization |
| Oct 14, 2022 | Gull Lake kayak launch | None | Updates from routine monitoring program-organization |
| Oct 14, 2022 | Gull Lake kayak launch | None | Updates from routine monitoring program-organization |
| Jun 29, 2022 | Gull Lake kayak launch | None | Updates from routine monitoring program-organization |
| Jun 29, 2022 | Gull Lake kayak launch | None | Updates from routine monitoring program-organization |
| May 26, 2022 | Gull Lake kayak launch | None | Updates from routine monitoring program-organization |
| Jun 24, 2021 | Spot not described | 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.