Actually you can google Rocky Mountain Saddle Horse Association. This gets you to their website. You can then go to their pedigree database and accept their terms. (That just basically says if there is an error in their database it isn't their fault.) You can then put in your horses registered name and see the entire bloodline 6 generations back.
You can also google ancestors in your horses line and often find more info.
Basically with the Rockies most everybody is related to all the base horses, with only around 25,000 in the US you probably have a least two or more big names in your pedigree.
The ones I find more interesting are the younger stallions/mares that are out there in judging contests now and what they are producing for further down the line.
It's fun to watch as you can actually start to see now how different stallions produce horses more for trail and another line for show. The highsteppers Nate talks about. I only hope they don't ruin the publics opinion of the breed as they did with the walkers. So far it looks like the Rocky Association is trying to keep the breed versatile. It seems to still be a pretty small group, as compared to say QH, so most people know the good stock lines they want to continue.
A woman can NEVER have too many horses.....