Miss Squires, 30, whose death resulted in an outpouring of generous donations in her name, will be buried at noon on Wednesday at St Andrew's Church in the village of North Kilworth, Leicestershire. She will be buried next to her brother Grant, who died in 2001, aged 25.
The coroner at the inquest into his death recorded an open verdict - it has been reported he was a drug user and was depressed after being involved in a car crash in which his girlfriend was killed.
Donations made in memory of 30-year-old Claire Squires have broken the £1million mark on the same day her funeral has been announced.
The 30-year-old who died during Sunday's London Marathon has been called an "inspiration" and "incredible".
Donations to the charity of Claire Squires, the young woman who died in the London marathon, have reached almost £220,000.