With more than 2,400 acres of open space, William Frederick Hayden Park on Green Mountain is the second largest park in Lakewood. The park features a challenging network of multi-use trails. The 6,800 ft. summit of Green Mountain Trail offers unique and stunning views of the Denver metropolitan area to the east and high mountain peaks to the west.
The park is home to more than 20 miles of multi-use trails that are open to hikers, cyclists, and equestrians. The park is very popular due to it’s proximity to Denver and easy access. Most days see a significant amount of traffic using the single track throughout the park. There’s a good bit of parking at the main trailhead at 39.69006811200695, -105.1519379044167 and a map of the park.
The main trail in the park is the Green Mountain Trail, a 6.6. mile loop that features a challenging ascent to the park’s highest point as well as a less challenging section along the base of the park that is great for beginner hikers, runners and mountain bikers. The Green Mountain Trail meets the Summit Loop Trail near the large radio tower that dominates the Eastern side of the park.
The Summit Loop Trail is a 2.75 mile trail that winds around a portion of the park’s summit. This trail features exceptional views to the north, and also provides access for the Box-o-Rox trail. Box-o-Rox is a popular and more challenging mountain bike trail that offers more technical terrain, and including a challenging rock section with alternate lines.
Another popular trail in the park is the Rooney Valley Trail, a 3.1 mile loop trail cutting through the middle of the park and offering an alternative to the Green Mountain Loop. Rooney Valley Trail is a single track trail that’s somewhat steep in places and features smaller loose rocks. It’s another frequently traveled spot for mountain bikers, so use caution when hiking this trail. The Rooney Valley Trail is accessible from the Rooney Road Trailhead, just off of CO-470 (39.696622626155495, -105.1921580642841) on the West side of the park and offers great front range views to the West.