The easiest way to start looking for group boards is so head straight to Pinterest search and type in some keywords followed by "group board". That will get you tons of results to start looking through.
Time to get sneaky! Stake out other Pinterest accounts that share similar content and see what group boards they're posting to. They might even be running their own board that you can join.
Besides searching for actual boards, you can search pins for blog posts about group boards. Lots of bloggers share their favorite group boards or offer up a mini directory of groups.
There are several groups just for posting about Pinterest group boards! You can search the archives for groups posted by others, post your own group board, or ask for board suggestions.
Here are a few Facebook groups just for Pinterest
BoardBooster has a directory of high performing group boards. You don't even have to have a BoardBooster account to use it.
PinGroupie is another directory just for finding group boards. For awhile it wasn't updated but as of a few months ago, it's up and running again.
The Pin Junkie is a blog about Pinterest
