Family and friends will leave flowers for the couple at a memorial bench, which stands in front of South Shields Town Hall on Westoe Road.
Nearly 200 businesses, schools and organisations in the town, meanwhile, will take part in events to raise money for the The Chloe and Liam Together Forever Trust, founded in their honour to help young people "reach their potential" in sport and performance.
A golf day will take place at South Shields Golf Club on 9 June, followed by a charity football match at Harton and Westoe Miners Welfare on 24 June and a gala dinner at the Hilton Hotel in Gateshead on 8 July.