Quick Info
Elevation: 6,854 ft summit. Activities: Hiking, mountain biking, trail running. Views: Denver skyline east, mountains west. Difficulty: Easy to moderate. Fee: Free. Best for: Quick workout with views.
Green Mountain is one of the most popular hiking and mountain biking destinations in metro Denver. The modest summit offers panoramic views—Denver skyline to the east, Rocky Mountains to the west—with easy access from the city.
Trails
Summit Trail
Direct route to the top. Moderate grade with good views throughout. Most popular hiking route.
Hayden Trail
Loop option with varied terrain. Popular with mountain bikers.
Multiple Trailheads
Access points on multiple sides of the mountain. William Frederick Hayden Park provides the main access.
Hiking
Difficulty
Easy to moderate depending on route. Summit hike is about 3-4 miles round trip with 800 ft elevation gain.
Time
1-2 hours for a summit hike. Longer for extended trail exploration.
Views
Summit provides 360-degree views. Watch sunrise or sunset for dramatic lighting.
Mountain Biking
Trail Types
Mix of cross-country and technical trails. Something for various skill levels.
Popularity
Very popular with local mountain bikers. Expect company on nice days.
Tips
Go early. Parking fills on weekends. Beat the crowds.
Watch for bikes. Multi-use trails. Stay alert and yield appropriately.
Bring water. No facilities on the mountain.
Sunset hikes. Beautiful views as the sun sets over the mountains.
Frequently Asked Questions
Is Green Mountain hard?
Moderate—not difficult for regular hikers. Some elevation gain but manageable.
Are dogs allowed?
Yes, on leash. Popular dog walking destination.
Is there parking?
Free parking at trailheads. Fills up on nice weekends.
Is it snowy in winter?
Can be. Trails may be icy after snow. Microspikes helpful.