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William Frederick Hayden Park

National Trails Day Hikers at Hayden Green Mountain William Hayden Green Mountain
1000 S. Rooney Rd.
(Multiple access points on Alameda Pkwy. and Rooney Rd.)
Lakewood, CO 80228

Daily 5 a.m. - 10 p.m.


The City of Lakewood has instituted fire restrictions for Lakewood’s Bear Creek Lake Park, Thunder Valley Motocross Park and William Frederick Hayden Park on Green Mountain. For more details, visit


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 summit, at 6,800 feet, offers unique and stunning views of the Denver metropolitan area to the east, as well as high mountain peaks to the west.


Since 1972, the majority of William Frederick Hayden Park was donated by, or purchased from, the Hayden Family. Once home to the buffalo, this park now provides rich habitat for a diverse array of wildlife, including coyotes, hawks, rattlesnakes, bluebirds, rabbit, mule deer and an occasional mountain lion.



Public meeting about military munitions in park on Green Mountain. Details here.


The north side of Hayden Park on Green Mountain was used as an artillery target range for the nearby Camp George West,  the Colorado National Guard’s training facility during the first half of the 20th century.  As such, the possibility of old military munitions and debris exists in the park. Park visitors should stay on marked trails as the park rules require. The U.S. Army Corps. of Engineers, the Colorado Department of Public Health and Environment and the Colorado Army National Guard are working to investigate the presence of old munitions to determine ways to clean up the area.  For more information, please visit





  • Hiking Trails
  • Restrooms
  • Parking Lot


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Why does my dog have to be on leash at William F. Hayden Park on Green Mountain?
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Why are you closing the trails on William F. Hayden Park on Green Mountain?
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