Want a chance to win free breakfast for life?

Diner frequenters, take heed: The Denny’s restaurant chain this summer is hosting its “50 State Challenge,” an interactive race across America awarding lucky guests multiple loyalty-based rewards — and one winner free Grand Slam breakfasts for life.

To participate, download the free Denny’s mobile app (available for Android and iPhone — click through the iPhone screenshot to download if you’re reading on your phone; hit the QR for Android) and check in at Denny’s locations across the country from the app. The first diner to check in at a location in each of the 50 United States will win the grand-slam prize — Grand Slams for life.

Dedicated diners can take on the challenge alone or team up with two other friends to tackle check-ins together, where they will win free Grand Slams for a year for completing the contest.

The challenge will be live on the app for one year, and for every check-in during this time users will unlock a digital state souvenir and a variety of badges that deliver exciting rewards, special in-store offers and redeemable coupons.

Guests are rewarded for visiting as many Denny’s as possible, gathering milestone prizes the more check-ins they accrue. Milestone prizes get bigger and better the more states visited. The launch of the challenge also coincides with Denny’s new Tour of America menu, featuring regional specialties from across the country. Find more via https://dennys.com/.