There are several in the general area. Most have HOA's. I tend to prefer without HOA's for myself but there are some that are very inexpensive and fairly unrestrictive, you might want to leave yourself open to the right property in an HOA but maybe not look at Wildhorse or Bridlewood kinds of HOA's. But if you really want NO HOA's well, you should get what you want in that price range and sometimes it just takes time to find the right combination of features, location and price.
If you'd like to contact me through my Trulia profile, I can set you up with an MLS Portal which will fill with properties, as they come onto the market, that allow horses and have no HOA's. There is no cost for this and no obligation.
To answer your question specifically, there are homes in Grimes Canyon that show no HOA's, Somis as some have mentioned is a good option, there are others peppered in outlying areas of TO and NP too.