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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.

There are no fire restrictions currently in place. Learn more about Fire Restrictions.


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.




  • 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?
What potentially hazardous animals are on William F. Hayden Park on Green Mountain?
What does the volunteer bike patrol do?
I see cars driving on William F. Hayden Park on Green Mountain, who are they?
Why are you closing the trails on William F. Hayden Park on Green Mountain?
What are you doing to prevent car break-ins at the parking lot?
Why can’t I walk off trail in the park?
Who do I call if I have a complaint, question, concern or problem on William F. Hayden Park on Green Mountain?


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