I am looking for a series that have the same characters throughout several books.  Example: Outlander and Into the Wilderness.  I find that these books tend to be some of my favorites.  I like reading about what happens after they get their HEA.  Maybe they go through other adventures or having kids.  I like to see how the hero and heroine grow and what takes place in there life after they get together.  

well then it's a good thing you're reading the Wilderness series then!  ;-) 

I really enjoy the continued stories too, especially with characters you've really come to love.  I've seen them refered to as family stories. 

The only one I can think of is Earth's Children Series (starting with Clan of the Cave Bear) by Jean M Auel has Ayla and Jondalar as main characters and lovers throughout the series (except the first book, which is just about Ayla). I guess it isn't really "romance" like some might not consider Outlander to be romance, and it is set during the Ice Age. Though you may have read these already, the first one was published in the 70's or 80's I believe, but the most recent was published a few years ago.

Family Sagas are what you're looking for.

If you're in to contemporary, I highly recommend Robyn Carr's Virgin River series.  She has 3 books in the series with continuing characters and has plans for 3 more in the series.

Sherri

The Rainbow Season and The Rainbow Promise by Lisa Gregory (historical)

To Die For and Drop Dead Gorgeous by Linda Howard (contemporary)

I just remembered that Kilgannon and Wild Rose of Kilgannon by Kathleen Givens have the same two h/h. I didn't care for them, but many people really like them.

Marsha Canham's Pride of Lions and Blood of Roses also have the same h/h in them. Both scottish historical romances. I liked Canham's better.

 I thought I had them, but I already swapped them.

Maybe I'll remember more in a few minutes :P

It's very different from historicals, but JD Robb's "in death" series is great for seeing developing relationships.

I have one on my TBR called Beyond the Sea of Ice by William Sarabande it is #1 in a series about the first americans. I don't know much about them.

I also loved the Virgin River series. I hated to finish it and was so happy to hear that there are more coming. I liked the Outlander series through the fourth one and then they just didn't appeal to me any more. Honestly, Jamie and Claire got too old and the daughter never did anything for me.Romances are escapism for me and I don't need to read about middle-aged relatonships- I'm living it! LOL

I've read some of the First Americans series. I've liked what I read, though not as much as Auel's work, which is what I would compare it to. It follows the same family throughout, though, like you are looking for.

For good continuations you could try:

Jo Beverley's Company of Rogues & the Malloren family series: jobev.com

Also Julia Quinn's Bridgerton series: Family Tree

However, each of these follow the same family/friends, but not the same characters all the way through.

I'd recommend Suzanne Brockmann's Troubleshooters series for contemporary--most of the characters show up in book after book (and it makes me mad when my favorite character doesn't show up much).

For historical there is Mary Balogh's Slightly series---it follows the Bedwyn family (brothers and sisters) as they find their true loves. There is also her Simply series which features some of the same characters--the Bedwyn's have shown up in the ones I've read so far.

Jule Garwood has a few that cross over too - Ransom and The Bride.

Sherri