Your mountain biking excursion today will begin with a relaxing ride through tropical forest on a paved road, along the old route that used to connect the Arenal Dam with the main entrance to the volcano national park.  From here you will continue towards the village of El Castillo, biking on a quiet road surrounded by dense forest and cattle farms, where you may be able to hear the distant calls of toucans and howler monkeys. Depending on the conditions and preferences of the rest of the group, the final section of cycling make take you across the dam and along a scenic stretch along the north shore of Lake Arenal. The maximum distance covered on this excursion is eight miles and it is suitable for all abilities.