Mountain biking is popular in mainland France, and now it has reached Martinique. You can rent a VTT (Vélo Tout Terrain), a bike specially designed with 18 speeds to handle all terrains, for EUR 15 with helmet, delivery, and pickup from your hotel, although it requires a EUR 150 credit card deposit. V. T. Tilt (Les Trois-Ilets, 97229. 0596/66-01-01. www.vttilt.com) has an English-speaking owner who loves to put together groups for fun tours, either half day or full day, which includes lunch. They can be beach, river, or mountain rides; tours of plantations or horse ranches; and historic, adventure, or nature experiences.