Dennis Quaid & Wife -- DIVORCE DISMISSED ... Now Let's Bike Together!

So much for Dennis Quaid's divorce ... a judge has officially DISMISSED the case after the couple reconciled earlier this year and now they appear to be one happy family again.

We broke the story ... Dennis and Kimberly Quaid had reconciled back in March but the divorce petition was far enough along in the court system that they couldn't just withdraw it -- they had to go to a judge. So they did ... and now we've learned their wish was granted.

The couple -- which married back in 2004 -- have 2 children together -- but the kids were nowhere to be seen on Friday, when D & K grabbed their road bikes and peddled through Brentwood.