Surf is about riding surf boards, but some people like to ride horses. For this we have Horse Rock.
I could continue with horse-related jokes. Something about "galloping rhythms". Then I'd have to think really hard for more parallels. I'd suggest you check out their website instead, it's much funnier than whatever I would say. Here's something I took from their FAQ section
QUESTION: MY FRIEND'S COUSIN SAYS THAT HORSE ROCK USE REAL HORSES ON STAGE FOR BACKING VOCALS. IS THIS TRUE?
ANSWER: UNFORTUNATELY YOUR FRIEND'S COUSIN IS QUITE IGNORANT ON THIS MATTER, WE ONLY HAVE 1 HORSE ON STAGE FOR BACKING VOCALS, THE REST ARE NORMALLY BACKSTAGE SMOKING.
Anyway, this is not their fabled aged-vinyl never-to-be-released "Equine Surf" record, but what I've heard is forceful, pounding, and pretty fun. Galloping rhythms and all that.