SINtral Valley Derby Girls are Modesto's first and only women's flat track roller deby league. The league began its formation in August 2008, and began practicing on skates in early September 2008. We are skater-owned and operated, and have a roster of over 30 hard-hitting, fast-skating athletes.
We are a proud member league of USARS, and are one of the hundreds of leagues across the nation that have embraced the quickly-growing sport of roller derby as it is skated on a flat track.
The SINNERs are Modesto's SINtral Valley Derby Girls who participate in "bouts" all across the state. The INNOCENTs are the up-and coming Derby Girls who practice alongside the sinners until they "move up" to SINNER status.