i can give you some ideas for horse races if you like, i tend to build horse race tracks a lot but they are no ordinary tracks, i build horse race tracks with inspiration i got from kart racers such as Crash Team Racing Nitro Fueled (the best Kart Racer), Mario Kart, and Renzo Racer just to name a few, i like to make horse races with a lot of jumps, some include jumping through treetops, jumping along lilypads even along rooftops and through mansions and other things like that, if you'd like to try out some tracks like that then please feel free, that is if you haven't already, although side note sometimes i even like to add references to my tracks too such as buildings and pixel arts and so much more from animes, animated carttoons in general sometimes not animated shows and even some from games too, i think it would be nice to see others try that stuff too, like maybe a track based on and inspired by happy tree friends, if you don't know abbout happy tree friends and maybe you'd like to you could look it up if you want, honestly i think it would be cool to see a track inspired by HTF, (Happy Tree Friends

Road shapes are surprisingly realistic and player-friendly! Had a great drive!
You could even add some more decorations to spice up these awesome tracks!