Dont miss this oppertunity to enjoy 3 plus mils of hiking, just have to look back every so often for bikers. 1.75 to enter Key Biscayne & 6.00 to enter the trails. Well worth it. Best trail to hike Highway to hell. More elevation than you might think. Start out following the trail signs and always take the more difficult trails when asked. The trail is a loop back to the parking.You wont be sorry this is the best in Miami.mwhen done head over to Wiskey Joe's for a cold one.