Retro-themed diner Hwy 55 Burgers, Shakes & Fries is bringing back an old-school 50s-style party to Rock Hill, South Carolina.

On April 2, Hwy 55 is hosting a Grand Opening Celebration at 4859 Old York Road in Rock Hill. This is the first Hwy 55 in Rock Hill and the celebrated brand plans an additional 50 South Carolina over the next 10 years.

The celebration from 11 a.m. to 3 p.m. will feature a live disc jockey, a Classic Car Cruise-in with three car clubs participating, and a donation presentation to Lancaster's Dream Team.

The highlight of the event will be the 55 Challenge, Hwy 55’s famous hamburger eating contest. The 55 Challenge begins at noon and the winner receives a four-month membership to LA Fitness and a $55 Hwy 55 gift card.

The 55 Challenge has been a crowd favorite on Hwy 55’s menu since the brand’s inception 25 years ago. The 55-ounce burger with seven patties and at least four trimmings on a bun comes with fries and a 24-ounce drink. If a guest can eat it all in 30 minutes, it’s free and Hwy 55 will put the guest’s name on their website for bragging rights. If the guest is unable to finish the meal in 30 minutes, it costs $29.99.

For the burger-eating contest on April 2, there’s no cost to participate.

Hwy 55 Burgers, Shakes & Fries boasts a fresh, All-American diner experience with fresh, never-frozen burgers, premium sliced cheesesteaks piled high on steamed hoagies, and frozen custard made in-house every day. With its open-grill design, the kitchen's dedication and care when hand-crafting meals is front and center.

In keeping with Hwy 55’s continued mission to give back to the communities it enters, the restaurant chain’s charitable organization, The Andy’s Foundation, and franchise owners donated 10 percent of their sales the first three days open to the local Dream Team Foundation, whose mission is to enrich the lives of special needs children through various sports activities. The Dream Team Foundation has been making the impossible, possible since 2007.

Casual Dining, Chain Restaurants, Industry News, Hwy 55