Go Further is a 2003 documentary film by Ron Mann starring Woody Harrelson and a group of other environmental activists riding around in a large, bio-fueled bus. The tour was called the Simple Organic Living Tour and it was produced by cause-related marketers the Spitfire Agency. The film debuted at the South by Southwest Film Festival in March 2003, and at the Toronto International Film Festival in September 2003, where it was first runner-up for the People's Choice Award. It was also nominated for a Genie Award for Best Documentary. The film features cameos by Dave Matthews, Natalie Merchant, Ken Kesey, Bob Weir (of the Grateful Dead), Michael Franti (of Spearhead), Anthony Kiedis (of Red Hot Chili Peppers), Rob Heydon, Medeski Martin & Wood, and The String Cheese Incident.