The Curly Lake Highline trail is long and difficult and for those in top shape. It will be one of the best rides you will ever do. It has a mix of single track, dirt roads and some very technical sections with some gripping downhills. Once you reach Curly Lake which is a great place for lunch and a break, you are only about one third of the way. There are stunning views of the Tobacco Root Range and the surrounding valleys. Some opt for shuttling 4 miles of the dirt road (South Boulder Road) to cut out some mileage and elevation gain. It’s a good idea to bring a water filter to fill up at Curly Lake.