Maho is one of the best places to take a run! You can check out this blog, [
stjohnrunner.blogspot.com] I'm sure Luigi will help you with specific questions about running.
You can rent fishing gear at Ocean Runner. They also sell gear and tackle. They are right on the beach after you get off the ferry dock to the right, between High Tide and Waterfront Bistro (kind of tucked away). Their website is www.oceanrunnerusvi.com and their number is 340-693-8809. You may want to give handline fishing a try. They sell that gear, and it is inexpensive, and more portable than a pole. I love hand line shore fishing!! Just don't fish in marked swim zones.
You can rent a dingy just down the beach from Ocean Runner. The is a place called Noah's Little Arcs, at the end of the beach. It is basically a "chair" in front of the Beach Bar. Someone is either there, or very near by, to help you out. I think people usually have a great time hopping from beach to beach in those bright yellow dingy.
Safe travels, see you soon!