As you lie on your deathbed, looking back at your life, what will you be proud of? What will you regret?

For Ray and Wilma Yoder of Goshen, Indiana, it will probably be joy that they feel, at the achievement of visiting every single Cracker Barrel restaurant on the planet Earth.

Unless, of course, another Cracker Barrel opens that they don't get to before they die. Then, that joy will be tinged with regret.

On Monday, the couple -- Ray is 80 and Wilma is 81 -- will visit the Cracker Barrel in Tualatin. It will be the 645th Cracker Barrel store/restaurants the couple has visited since they began their 40-year quest to visit every Cracker Barrel in the world.

Cracker Barrel is paying to bring the couple west on what will actually be Ray's 81st birthday. When they set foot in the Tualatin store, it will be the first time they can say they have been to every currently open Cracker Barrel location.

The Yoders have been married for over 60 years. And they really, really love Cracker Barrel.

According to an interview with ABC News, Ray Yoder started visiting Cracker Barrels in the '60s, when he was driving all over the country as an RV driver. When his wife started to join him, the casual enjoyment of the chain turned into a full-blown love affair.

"I've not had a bad experience anytime," Ray Yoder told the station. "I've always walked away feeling refreshed."

The couple began to mark their progress on maps taken from the restaurants. Now, their four children help them keep track of new stores using the company's website.

The Tualatin store may be the Yoders first West Coast Cracker Barrel trip but it probably won't be the last. The chain is opening an outlet in Beaverton in 2018 and then another in California the same year.

So the Yoders will continue on with their Sisyphean task of visiting Cracker Barrels, until such a time comes as there are no new Cracker Barrels, or the Yoders give up. But that second one probably isn't coming anytime soon. "For two old people, we're pretty fast moving," Ray Yoder told ABC News. "We're still healthy and we enjoy it so we keep doing it."

-- Lizzy Acker

503-221-8052

lacker@oregonian.com, @lizzzyacker