there are several stables in st Maarten and prices range from $45-$100 depending on experience level and how long you want to ride (if you've never ridden before an hour will be more than enough- you will be very sore!) just google St Maarten stables. We had fun just shopping and wandering around Marigot and Phillipsberg- Plenty to do just wandering around the open air market and sitting in the cafes in Marigot! lots of better snorkling elsewhere on other islands- Coki Beach on St Thomas is excellent if you are going there- and just $10 for snorkle rentals for the day!!!