The venue is staging Rockprest - the UK’s biggest free rock tribute festival.
Some of the biggest tribute acts in Europe are playing on two stages, over two days of crowd-surfing, chorus-chanting, festival fun.
There are bars, food stands, a market, a children’s area and thrill rides.
Driver caught 'snoring merrily away' on the M6 near Bamber Bridge with full-beam headlights and engine running
Fulwood flasher wearing balaclava leaves mum and her seven-year-old daughter feeling 'shaken up'
M6 to close overnight to allow two bridges damaged by vehicle strikes to be repaired
Murder inquiry launched after man critically injured in Preston assault dies
Leyland residents claim they are paying grounds maintenance fees to make it look "worse"
And organisers say it’s already been a big hit.
Acts that took to the stage yesterday included Mentallica, Guns or Roses and ACDC Experience.
Today, performances are coming from, among others, Supreme Queen, Flew Fighters and Speak & Spell.
Jools Taylor, of the festival, said: “It’s been a great success. We got a really good turnout yesterday, 6,000 came out and the weather held off.
“It’s been really well received.”
He said the feedback from the audience was good: “Brilliant, really good - a fantastic response.”
The first bands fired up at noon, with the last play at 10pm.
The free event calls for just a £2.90 booking fee.