North of Cortex and northwest of Dolores, the Sagehen Trail System is a 13 mile lollypop system loop through sage desert. The route combines doubletrack and singletrack. The loop is on the western shores of McPhee Reservoir.
To reach the mountain biking at the Sagehen Trail System from Dolores, head east on SR145. Turn right heading north on SR184. Turn right heading north on CR25 for 2.0 miles. Turn right heading east on unsigned dirt Road X for 0.6 miles. Turn right on unsigned dirt road and park on the right.
Overall, Sagehen Trail System is the 146th most popular mountain bike trail of all 175 mountain biking rides in Colorado.