Speaking to the BBC, Jackie Roberts said she found the event “frustrating” at a time when she has just lost her daughter.
York St John fine arts undergraduate Megan Roberts, 20, died in January following a night out in Popworld. Her body was discovered in March along the River Ouse and police say drinking had been a factor in her death.
Named after Foreign Secretary William Hague, the Hagueathon takes place on 3 May and invites students to drink as many as 14 pints of beer.
The event, which follows the deaths of three students in the local area in the last three months, has been criticised in the past for promoting binge-drinking despite organisers insisting it is not compulsory.
Labour MP Graheme Morris said in 2013 that it was a “bad example” towards the current drinking problems that the country faces.
But the York Tories insist it is a social event and no incidents have happened in the past.
A spokesperson for the University said: “Our students are adults and the overwhelming majority are aware of the dangers of consuming excess alcohol, particularly in light of recent events in York.”