John Day River, River system in eastern Oregon, US.
The John Day River flows through northeastern Oregon, carving deep canyons through layers of volcanic basalt with walls rising up to 1,600 feet. The river's path creates a striking geological landscape that reveals millions of years of erosion and volcanic activity.
The river was named after John Day, a fur trader who struggled during his journey through eastern Oregon in the early 1800s. His experience left an enduring mark on the landscape through the name given to this waterway.
The Cayuse people called this river the Mah-Hah, and their connection to the land shaped the area for thousands of years. Archaeological sites along the banks tell the story of continuous human presence in the region.
Boaters planning trips between Service Creek and Tumwater Falls need to secure an online permit before launching. The river's water levels vary seasonally, so timing your visit is important for a safe and enjoyable experience.
This river remains free of dams along its entire length, a rarity for major waterways in the region. Its status as an undammed river makes it one of the most pristine flowing waters in the continental interior.
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