About 400 volunteers dedicated their Saturday morning to the 15th annual Boise River Sweep.
The volunteers picked up trash that was in the water and along the banks from Boise to Caldwell.
The Boise River provides recreation, irrigation, and drinking water to hundreds of thousands of people across the Treasure Valley.
"It's the backbone of our community, and it's very, very important that people do their part and help us keep it clean and safe," said Aimee Hughes, education coordinator for the City of Boise's Partners for Clean Water program.
Organizers say because of all the hard work that volunteers have put in over time, there is not nearly as much trash in the river through Boise.
Next year, they'll focus their effort downstream, in Garden City.
Copyright 2016 KTVB