Santa Clarita , California ( CNN ) -- Paul Walker fans came by the thousands Sunday to mourn for the actor at the site where he and a friend died last weekend . Many of them drove by in souped-up cars fit to be used in Walker 's `` Fast & Furious '' street race scenes , but others parked blocks away and walked to the business park about 30 miles north of Hollywood where eight days earlier Walker and Roger Rodas died in a fiery car crash . A Christmas tree now stands where the red 2005 Porsche Carrera GT burned after clipping a light pole on the afternoon of November 30 . Candles , flowers , signs and other mementos left by fans cover the ground . The miles-long line of cars was allowed to drive slowly by the the normally quiet spot on Hercules Street in Santa Clarita . The death of Paul Walker : What we know so far . Two small airplanes circled overhead , towing banners : `` RIP God be with Fast & Furious star Paul Walker ... Our hearts go out to his friends and family . ( Heart ) # 17 Paris Hilton . '' It was not clear whether Hilton had sponsored the aerial banners . The appropriation of Paul Walker . The memorial , loosely organized through Facebook pages and Southern California car clubs , was not sanctioned by the families of Walker or Rodas . A spontaneous memorial began the moment Los Angeles County sheriff 's deputies removed the yellow tape around the crash site eight hours after last weekend 's wreck . Fans were already waiting with flowers that piled up and candles that burned on the roadside where Walker and Rodas died . Every night and day since the crash , fans have gathered and left mementos . Walker 's co-stars joined them at times . Vin Diesel used a police car 's loudspeaker Tuesday to thank a crowd of mourning fans , calling Walker an `` angel up in Heaven . '' Actor-singer Tyrese Gibson broke down sobbing as he laid a yellow flower at the site . The Los Angeles County coroner 's office on Wednesday said Walker died of `` the combined effects of traumatic and thermal injuries . '' Speed was a factor in the crash , the sheriff 's office has said . On the day of the crash , Walker was attending a holiday toy donation event for his charity , Reach Out WorldWide , when he hopped into the car with Rodas for a ride , witnesses said . The Porsche , which was one of only a few hundred made , was on display at the event , which was held at a high-performance car shop owned by Rodas . Man arrested for stealing part of Walker 's Porsche wreckage .
NEW : A Christmas tree now stands where the red 2005 Porsche Carrera GT burned . The car was parked on a street in Santa Monica, California, when it caught fire and burst into flames. Fans organized the memorial on Facebook and through Southern California car clubs . Every day since Walker 's death , fans have gathered and left mementos , flowers .