Southwest of San Juan, the Toro Verde Nature Park has 14 miles of mountain biking trails. There is a high daily fee to use these trails.
To reach Toro Verde Nature Park from Highway 22, use Exit #22 towards Morovis (left at the traffic light). This will be Tony Laureano Expressway PR137. Continue driving until you reach the fifth light, the flashing one, and make a right turn. Follow PR155 all the way to Orocovis until kilometer 32.9. Note: While driving on Tony Laureano Expressway PR137 you will see many exits to PR155, wait until the flashing light to make the right turn and you will avoid many curves.
Overall, Toro Verde Nature Park is the 5th most popular mountain bike trail of all 6 mountain biking rides in Puerto Rico.