My wife drove by w while ago to take a look at the set up for Horse trails, as we heard that you had them there. Is that true? Would love to come and ride there!!

Yes it is true. Horseback riding is listed on park website https://www.mass.gov/locations/wompatuck-state-park It is also listed on camping reservations so there may be setup for horse camp sites. If you can not find out information online I would drive to ranger/visitor center and get more info or grab a map there if it's closed. Try calling. Would be a beautiful place to horseback ride! https://www.reserveamerica.com/explore/wompatuck-state-park/MA/32628/overview

I am not sure about horse trails. There are quite a few horse farms within a mile or two so I think it is likely, but I will have to defer to you asking/confirming with the D.C.R.