Brandon Gunnoe and 7News visited Fuddruckers in Reading to cover the annual 3-pound burger challenge.  Proceeds from the event benefits the Martin Richard Foundation.

READING, Mass. (WHDH) — Diners at Fuddruckers in Massachusetts are working up an appetite Tuesday to raise money for the Martin Richard Foundation.

The challenge requires diners to eat a 3-pound burger on a 1-pound bun, plus another pound of fries. If they finish the entire meal in an hour, they get a $25 gift card to Fuddruckers.

Part of the proceeds for entering the contest goes to the Martin Richard Foundation. The charity helps local youth programs in memory of Martin Richard, the 8-year-old boy killed in the Boston Marathon bombing back in 2013.

The fundraiser is taking place at four Fuddruckers in Massachusetts. Each fundraiser features a runner who is running for the MR8 team in this year’s Boston Marathon.

Out of about 130 people who participated in the challenge, only seven were able to finish the entire meal.