10,000 runners are preparing to take to the streets of Bristol this weekend for the 30th Great Bristol Half Marathon.
Joining them will be Somerset dad Greg Sumner who almost died in a car crash. In 2012 he was a passenger in a car being driven by a friend who'd been drinking. That night his life changed forever.
Greg survived, just. He suffered brain injuries and is having to do the 13.1 mile route in a battery operated wheelchair and is raising money for the brain injury charity Headway.
Greg now works with Avon and Somerset Fire and Rescue talking to young people about drink driving. A living example of what can go wrong.
He needs to be accompanied so he's roped in his sister Abi to go round with him. He's wants to make as much out of life as possible and to do everything he can for and with his family.
Although Greg is in a powered wheelchair his injuries still make the half marathon a mental and physical challenge. If it goes well his next target id to give the London Marathon a go.