Don't bother using a coupon!
I agree with the "Questionable Service" review.
I love to ride and really would have loved to try this place. But, don't try using a coupon.
I tried to use an Entertainment Daily Deal coupon. Later, I tried to use the Tucson Passport. I placed multiple calls and they did not call me back (probably because I mentioned that I had the coupon). When I finally spoke to "Del", he was not very pleasant. He complained about Groupon, Entertainment Book, and the Tucson Passport book. (Cocoraque ran deals in all of these books.) He complained how 'everyone wants everything for free' (in relation to the "buy-one-get-one-free" coupon).
Other adult friends bought the coupons and, if he knew they were acquainted (he asked them lots of questions before scheduling), he wouldn't schedule their rides together. He complained to them about the weather being too hot, people wanting to "ride for free", the horses getting ridden too much, etc.
Multiple friends with coupons tried to schedule rides at this place and he was either unpleasant or didn't bother to return calls. He also asked them a bunch of questions, basically aimed at hassling coupon-holders. He made it impossible to schedule a ride. I, too, had to ask for my $ back.
Cocoraque puts their coupons in so many books, then doesn't want to honor them or puts ridiculous limitations on them. If they are so busy, they need to stop offering these "great deals" and just stick with having people pay full price.