Green Mountain (a.k.a. William F. Hayden Park) Mountain Bike Guide

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Difficulty: Moderate
Length: 7.8 miles / 12.6 km
Duration: 1-3 hours

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Overview: This is an easy to intermediate trail about 20 minutes west of Denver.

Directions: Take I-70 West from Denver for about 9 miles to C470-East exit (exit 260). Go about 2 miles on C470 East and take the Alameda Parkway exit. Turn right onto Alameda Parkway, then take your first right onto Rooney Road. Go about 1.5 miles and the trail head parking lot will be on your right.

Description: This trail is fairly easy with a good climb and intermediate descents. This is an easy to intermediate level ride.

Trail Stats
Length of trail: 7.8 miles
Total elevation gain: about 1000 feet

Tips: Keep in mind that the ride described is only one way to enjoy Green Mountain. Feel free to explore the different trails in different combinations. The trails are all a little different.

Green Mountain gets a lot of sunshine, so this is one of the first trails that can be ridden in early spring, after the snow melts.

Points of Interest

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Parking Lot off of Rooney Road

From the parking lot, head southeast and cross over the bridge that goes over Highway C-470.

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0.2 miles

Shortly after crossing the bridge over highway C470, there is a single track off to the right. It splits almost immediately. You can go either way, as they both hook back up in a short while. In fact, they are both called the Green Mountain Trail. For this ride, I opted to go to the left.

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0.9 miles

The trails hook back up here, as well as with the Rooney Valley Trail. Continue on the Green Mountain Trail. The trail is a rolling trail that essentially parallels Alameda Parkway.

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2.4 miles

Continue following the signs for the Green Mountain Trail.

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3 miles

This is the intersection with the John O. Hayden Trail. Turn left and climb up the John O Hayden Trail. This portion of the trail snakes up Green Mountain, a fairly difficult climb.

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3.4 miles

This is an intersection with a connector trail to the Green Mountain Trail. Take a sharp left and continue climbing the John O. Hayden Trail to the top.

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4.3 miles

Congratulations, you have survived the main climb for this ride. You are now at the intersetion with the Green Mountain Trail, which is essentially a jeep road at this section. Go left onto the Green Mountain Trail.

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4.8 miles

Intersection with the Rooney Valley Trail. Continue straight on the Green Mountain Trail.

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4.9 miles

The second intersection with the Rooney Valley Trail. Just like the last intersection, continue straight on the Green Mountain Trail.

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5.1 miles

At the apex of the hairpin turn, continue straight onto the singletrack, leaving the Green Mountain Trail and continuing onto the Summit Loop Trail. Do not start descending down the Green Mountain Trail; this would be the wrong direction.

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5.4 miles

You are at the top of the Box O' Rox Trail. This is probably the most technical part of the entire ride. As you descend and get bounced around by the rocky singletrack, you will understand the name of the trail.

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6.5 miles

Continue on the newly rerouted portion of the Box O' Rox trail. This section is much less rocky.

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7.3 miles

The Box O' Rox Trail dumps you back out onto the jeep road climb portion of the Green Mountain Trail. Take a right and descend back to the parking lot.

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7.4 miles

Continue straight on the Green Mountain Trail jeep road. Don't take this hidden singletrack on your left.

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Rooney Valley Trail downhill

This is the top of the Rooney Valley Trail. It is way more fun to ride down it than up it.

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Parking lot off of Alameda Parkway

This is the Florida Parking lot.

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Summit Loop Trail split

The Summit Loop Trail splits here. The trail does eventually loops back to this point (not shown on map).

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Summit Loop and Green Mountain Trail intersection

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Green Mountain Trail and Summit Loop Trail intersection

The Summit Loop Trail is a fun rolling singletrack. It parallels the top of the Green Mountain Trail and provides a good alternative for more singletrack riding instead of jeep road.

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Radio tower at the top of the Green Mountain Trail

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Intersection of Green Mountain and connector trail

The connector trail will bring you to the John O. Hayden Trail.

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Green Mountain Trail from the Florida Parking lot off Alameda Parkway

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Utah Parking lot

This is a very small parking lot at the junction of Alameda Parkway and Utah Avenue.

Pictures in this guide taken by: MooniakRides

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