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William F. Hayden Park on Green Mountain offers a challenging system of multiple-use trails for all abilities.  The trails tend to dry earlier than many of the foothills parks, making the park a fantastic winter destination. 

The park trails include:

  • Green Mountain Trail: 6.5 mile loop.  Features a challenging ascent to the park’s highest point
  • Hayden Trail: 1.6 miles. Accessed from the Utah Trailhead, this trail switchbacks up the south side of the mountain.
  • Summit Loop Trail: 2.75 miles. A very scenic trail around a portion of the park’s summit.
  • Rooney Valley Trail: 3 miles. A challenging single track trail that offers a sense of solitude and remoteness.
  • Box-o-Rox Trail: 1.7 miles. Another challenging single track trail considered a favorite of local mountain bikers.
  • North Access Trail: 2 miles.  This trail is accessed from Indiana Avenue and will be formalized in the near future.

Trail Use Guidelines

Please help protect park resources by remaining on designated trails only!

  • Avoid using wet or muddy trails. Current conditions are posted at park trailheads, or you can follow us on Twitter for updates
  • Follow proper yielding guidelines


  • Yield to ALL other trail users
  • Slow to a safe speed to pass
  • Make calm and friendly verbal contact prior to passing
  • Dismount for equestrians


  • Avoid blocking the trail
  • Yield to equestrians
  • All users must keep dogs on a leash at all times

Be courteous, communicate and listen. The trails are for everyone!




Hikers at William Hayden Park at Green MountainEquestrian Trail Riders

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