Northwest of Vail, the North Trail is a 12 mile route open to mountain biking. The route rolls across several ridges with several stout climbs and offers great views of Vail Mountain to the north.
There are several trailheads, including off Spraddle Creek Road in the east and off the west end of North Frontage Road at Trappers Run in the west.
If you are looking for some challenge, ride the North Trail from the east towards the west starting at the Spraddle Creek Road trailhead. From Spraddle, the next main trailhead is the mid-point trailhead at the lower end of Redstone Road (4.77 miles). Along the way, there is a challenging, steep climb for more than half the route. After the mid-point trailhead on Redstone, you can continue west on the North Trail for another 7.25 miles.
Tip - The North Trail #1896 is closed from April 15th to June 15th for wildlife protection. It is usually actively cleared and maintained just prior to the opening date.
Overall, North Trail is the 129th most popular mountain bike trail of all 176 mountain biking rides in Colorado.