Trailhead Adventures

Narrows Hike at Zion National Park
Narrows Hike at Zion National Park

Hikers beware, the presence of toxic cyanobacteria and cyanotoxin algae have been found in popular sections of Zion National Park.

The impacted locations include:

This impacts the water found in the following areas of Zion :

The NPS has advised hikers to carry extra filtered water with them on hikes and avoid submerging their heads in the waterways

If you are exposed to cyanobacteria, seek immediate medical attention and contact the Utah Poison Control Center at (800) 222-1222. If you are experiencing a medical emergency, call 911.

Additional information, including what you should do if exposed, can be found here (

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