The city of Santa Clarita will host the 25th Annual River Rally Cleanup and Environmental Expo on Saturday, September 21, from 8 a.m. to 11 a.m., starting at the Newhall Community Center located at 22421 Market Street.

Residents and organizations interested in participating are required to register by Friday, September 20, at 2 p.m. at GreenSantaClarita.com.

Nearly half of the Santa Clarita Valley’s water supply travels through the Santa Clara River, which is home to threatened and endangered species, such as the California condor and the California red-legged frog.

In addition to cleaning trash and debris from the riverbed, the event also protects the wildlife residing in the river system.

Participating volunteers must wear closed-toe shoes and appropriate clothing for walking in the riverbed, and are highly encouraged to bring sunscreen.

Volunteers are also encouraged to bring a reusable water bottle to help reduce waste and can refill at a water refill station courtesy of SCV Water.

Refreshments courtesy of Henry Mayo Hospital and Starbucks will be provided at the beginning of the event.

Other items including gloves, collection bags and a commemorative t-shirt sponsored in part by Five Point will be given to volunteers.

Cleanup participants will have the opportunity to enjoy the Environmental Expo, which will feature vendors offering tips on recycling, air quality, pollution prevention, water quality, open space preservation and wildlife conservation programs in Santa Clarita.

Participants are encouraged to carpool, walk or bike to the event site. A designated rideshare drop-off and pick-up area will be available on Market Street in addition to a FREE bike valet provided by InCycle.

The river cleanup is open to ages three and above with written permission from a parent or guardian. No pets are allowed.

For more information on the 25th Annual River Rally and Environmental Expo, please call the River Rally hotline at 661-284-1415 or visit GreenSantaClarita.com to register.