Along with June comes several dangers for tubers, swimmers, kayakers, and paddleboarders planning to spend time on the waters of southern Idaho's Snake River.

Excessive heat, rapid currents, and chemicals left over from the state's efforts to eradicate invasive mussels over the past three years are all valid concerns for Magic Valley residents who will be taking to the Snake River in the coming days to cool off and entertain friends and family.

Aside from the obvious concerns that come with the start of summer in southern Idaho's Snake River Canyon, there is another threat that sits out in the open and multiplies under the warmth of the sun.

95.7 KEZJ logo
Get our free mobile app

A Buildup Of Algae Along The Banks Of The Snake River In Southern Idaho Poses Certain Health Risks For Swimmers This Summer

Snake River algae along banks in Twin Falls, ID, June 2026    Credit: Greg Jannetta
Snake River algae along banks in Twin Falls, ID, June 2026    Credit: Greg Jannetta
loading...

READ MORE: Idaho's Toxic Algae Season Here: A Major Threat To Pets, Kids

Something that should be obvious to boaters who have navigated the Snake River beneath the Perrine Bridge lately is the excessive accumulation of algae along the banks of the river. Accidentally ingesting water that mixes with these algae trails can make pets and people sick.

Snake River passing through Twin Falls County, June 2026   Credit: Greg Jannetta
Snake River passing through Twin Falls County, June 2026   Credit: Greg Jannetta
loading...

Be careful when out on the water of the Snake River where algae has built up along shorelines. Try not to completely submerge yourself near these areas where there are excessive buildups. Symptoms of toxic algae ingestion include skin irritation, vomiting, headache, diarrhea, and potential paralysis, according to Natural Waterscapes.

Stanley Lake Kayaking / McGown Peak

Kayaking The Waters Of Stanley Lake In The Sawtooth Valley, ID

Gallery Credit: Greg Jannetta

More From 95.7 KEZJ