The South River Watershed Alliance, working with several other environmental groups, will host a tire roundup and clean-up on the South River on Saturday in south DeKalb.

Volunteers are needed to help remove trash and debris from the river at the Panola Shoals/Highway 155 area and downstream at Constitution Lakes. Crews will work from 9 a.m. to 1 p.m. and must register in advance.

Questions/register: southriverwatershedalliance@gmail.com.