An estimated 8,000 from all backgrounds attended Burnley's Reach 1 Festival in Queens Park.
The festival, organised by Burnley Council, Burnley College and Mid-Pennine Arts, aimed to bring people together and encourage communities to find out more about each other.
Mick Cartledge, Burnley Council's director of community and leisure services, said, "I thought it was a brilliant day. It proved the benefits of organisations working together. We would not have had such a brilliant range of activities if Mid Pennine Arts and Burnley College had not been involved.
"I would like to thank everyone for their hard work in making the festival such an enjoyable day."
A spokesman for Burnley Police said the event was enjoyed in the best of spirits.
"The festival is usually a light-hearted affair so we were not expecting any trouble and it seems to have passed without incident."
Acts and activities on the day included rock band Stonefish, American singer-songwriter Melissa Zeimer, local DJs, rap and graffiti art workshops, and the dance marquee hosted acts including the Hindu Dance Company.
The Daneshouse Trust Marquee hosted face-painting, sari dressing and henna painting, and there was a woodland festival in the park, including chainsaw sculpture, willow-weaving and wood-carving.
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