Does US Trotting have something similar to Equineline? If I wanted to look up some pedigrees from a hundred years ago, where online would I go?
https://pathway.ustrotting.com/search/index.cfm?
Yay, someone wants to look up a stb pedigree.
If it is quite old you will need to call them, the USTA, that is. They are pretty nice and helpful over there.
Tell us about your stb, if you want. 
I might be able to help with some older lines…not so good on the new ones now though
I use the link above to look for pedigree info that’s too old to be on the free part of Pathways.
Love the Bluechip link, thank you!
By the way, when the Unknowns show up in the pedigrees, it usually means the horse is listed in another Studbook like Morgan or Saddlebred or Thoroughbred. In the early days of the Trotting register, horses were often triple registered with offspring in several registries.
try looking for Wallace’s American Trotting register - many volumes
https://archive.org/details/wallacesamerica00assogoog
http://www.mi-harness.net/publct/wallacebks.html
Wallace also published anecdotes, news and opinions in Wallace’s Monthly.
https://archive.org/stream/wallacesmonthly00compgoog/wallacesmonthly00compgoog_djvu.txt
Have fun!
You can often find the outside horses on Pedigree query going back quite a bit farther.
[QUOTE=vineyridge;8339861]
Does US Trotting have something similar to Equineline? If I wanted to look up some pedigrees from a hundred years ago, where online would I go?[/QUOTE]
D_Bald provided a link to the web page I’ve on the Wallace Books.
The intent of that page is to provide a history of the how statistical data evolved and the oversight in non-recognition of Frank E. Best in same regard.
There are numerous websites that offer extensive and very old pedigrees of Standardbreds.
Here are two:
All Breed Pedigree
http://www.allbreedpedigree.com/
Sophia Pedigrees (Stula did an excellent job (and loads of work) in creating this online database)
http://www.travsport.no/Nyhetsarkiv/2014/Desember/Sophia-Pedigrees/
Some caution should be taken when researching less-than-famous pedigrees for Standardbreds.
In pre-USTA days (pre-1939) there were multiple registry orgs and it was not uncommon to have multiple horses (with different sires and dams) with the same name, and even in same races.
If you looking for some particular 100YO horse and unable to locate, than I may be able to assist.
[QUOTE=sonomacounty;8340147]
https://pathway.ustrotting.com/search/index.cfm?
Yay, someone wants to look up a stb pedigree.
If it is quite old you will need to call them, the USTA, that is. They are pretty nice and helpful over there.
Tell us about your stb, if you want. :)[/QUOTE]
Yes, do, please. (I actually would rather watch harness races than flat races but I don’t say so as much as I should.)
If you have specific names/time frames, might be able to help; have a full collection of Sires and Dams from 1949 on somewhere around here 
I found what I was looking for on Blue Chip Pedigrees. What I was looking at were Standardbreds who were exported to Europe and eventually show up in sport horse pedigrees. That’s primarily Sweden and France, but the particular horse I was looking at was German.
