Welcome to the forum
Being new to Walking Horses, you don't know that 99% of Tennessee Walking Horses are related to Midnight Sun. The "Chance" blood line was the only one that did not have Midnight Sun in it
That means, it is an accepted fact there pretty much is not a Walking Horse on the planet that isn't traceable to Midnight Sun
Your mare's bragging rights are Pride's Jubilee Star and Pride's Jubilee Encore
Pride of Midnight was sired by Midnight Sun. Pride of Midnight was Encore's Grandsire. Pride of Midnight is also the Grandsire to the horse in my avatar, who is now 26+ except my horse was sired by Pride's Genious, making my horse (Bonafide Genious) and Encore cousins who look absolutely nothing alike- my fella took after his dam --lollol My horse didn't "make", went to auction, and I bought him as a coming 3 yr old. He's been the absolute best and most fearless go-anywhere horse I have been privileged to bridle up
If you Google "Pride's Jubilee Encore", he is most likely your mare's grand or great-grandsire, depending how old she is. He won the WGC on 2001 when he was ten years old. Encore ended up being a "home boy", so his winning was a huge deal to the local folks.
I have three Tennessee Walkers, all from different blood lines, if one is looking at the most recent generations. Every one of them are gentle, willing and hard working trail horses. Well they were, they are all retired because I can't ride anymore and the youngest is 19 with severe insulin resistance.
That reminds me, don't let your mare put on too much weight. Keep her "race horse thin" where you can see her ribs when she moves a certain way. Tennessee Walkers are very prone to insulin resistance
Your pictures didn't post, hopefully you can re-link them so we can see her