After Castiel's search for God- which ended rather abruptly and horribly- Dean's mind stayed away from the subject. Finding a god he'd been told didn't care seemed like a waste of time. Unlike the angel, he didn't need some holy father figure to make it through in life. He never needed the idea of a God, didn't even believe in it for a long time. Of course he had a few questions, who wouldn't? And if he ever did find the entity, he wouldn't be the happiest camper in the woods. Mostly, though, it would be on Castiel's behalf. Everything went to absolute shit after he found out the apathy of God. Prayed so hard for guidance and got jack squat. 

Naturally, when God showed up, he shit bricks. Wished he would have kept that damn necklace, just for posterity, considering it was the cornerstone for the search, and hadn't even contributed to the finding. 

He spent two days in the car, driving nonstop on about four hours sleep, barreled down the highway at breakneck speed, only to wind up on a fucking boardwalk.  A boardwalk. Not, say, a library, a corporate executive's office, not even a freaking empty building with Morgan Freeman and a mop.

Just a boardwalk, which he walked down precariously, glancing around at the few people that were out- not very many- trying to figure out just exactly which one of them was God.