Former gambling addicts and their families are marching across the North East as part of a campaign to persuade the government to ban gambling adverts in football.
Campaigners are walking 40 miles (65km) from Tyneside to Teesside via the area's three biggest clubs - Newcastle, Sunderland and Middlesbrough.
All three have gambling firms as front-of-shirt sponsors.
Bodies overseeing the betting industry said firms abide by strict guidelines.
Organised by campaign group The Big Step, the march began on Friday outside Newcastle's St James' Park and then visited Sunderland's Stadium of Light.
It is expected to finish at Middlesbrough's Riverside Stadium at about 17:30 GMT.