Rider unresponsive but breathing at Riverfront MX Park Heard on: Linda Fire 00:10 00:00 Attention, Yuba Fire Station Four, respond medical aid. Transcript This transcript is auto-generated from live dispatch audio and may be incomplete or inaccurate. It is not an official report and may change. 00:00 Attention, Yuba Fire Station Four, respond medical aid. 00:03 Riverfront, Riverfront MX Park, (number withheld) Biz Johnson Drive for a rider down, unresponsive but breathing. 2026-10-07 03:35 UTC Medical Emergency Biz Johnson Dr, Marysville, CA 95901 View on map