Greensfelder - Fossil Ridge

This is a very hilly park, and all of the trails are either going up or down for the entire length, some of it in the shadow of the Six Flags roller coasters! Because of this steep terrain, large parts of these trails, mainly the low-lying areas, are slow to dry. Waiting 2-3 days after a rain is a good rule of thumb, except in very dry or frozen conditions. The upper part of Dogwood going counter clockwise is almost always rideable, but the bottom will typically remain wet for a long period after rain since the whole area drains down through it. Please use your best judgment on deciding whether to ride them when they are wet.

Many changes have taken place since GORC has reworked parts of existing trails, and built several new ones. The Dogwood loop was almost completely rerouted from 2004-06, and the DeClue trail has added considerable mileage, now stretching to 8 miles, and the current focus is in the northwest corner of the park on the Beulah Trail.

Due to the number of trail features, and its rocky surface, DeClue (8 miles) is considered a fairly technical place to ride. Expect a tough workout, and some sections that may require hike-a-bike (for short runs). If you like choosing your lines, fast narrow descents, and rocks to test your skills, then you'll love this trail. Dogwood (2.6 miles) is fast and flowy, with a banked s-turn, and some rocky spots thrown in to keep you on your toes. Eagle Valley (3.4 miles) is chat-covered doubletrack with the exception of 0.3 miles of singletrack behind the Visitor Center, and a short section near the stables. The Green Rock now shares a large part of its length with the DeClue trail. Its total length has increased to 14.5 miles, of which 8 are in Greensfelder.

All of the trails in the park are open to hikers, bikers, and equestrians. Trail traffic often includes horses, so be careful and courteous when encountering equestrian traffic. Always dismount your bike and go off the downhill side of the trail. For the most part though, this park is not heavily used. Make sure and take the bug spray in the summer.

If you want to "taste" Greensfelder before diving in, ride the Dogwood trail first. Depending on how you choose to ride the loops, you can get in rides from 8 to more than 18 miles just on Dogwood/DeClue/Eagle Valley.


Take Interstate 44 to the Allenton/Six Flags Exit 261. Go north on Allenton Rd,  past the Six Flags entrance. Allenton Rd. bisects Greensfelder Park. Parking is in the gravel parking lot for the Roundhouse Memorial on the left just before Hencken road.


There is a pit toilet at the trailhead, and at the 2 picnic shelters. Water is available at the 2 shelters and the learning center.

Trail Information

Trail Steward(s)


Intermediate / Advanced


16+ miles


Multiple Loops


Trail Conditions

Latest Conditions

From Maven on Mon, 07/16/2018 - 3:04pm - Greensfelder (St. Louis Area)
Sweet and dry almost hero dirt. Large tree down on declue top of monkey heads right where race loop down hill intersects the trail. It is a big messy one.
From Travis Arnold on Fri, 06/29/2018 - 8:39am - Greensfelder (St. Louis Area)
Very good. Tree down on the Allenton descent, otherwise mostly dry and clear. I got the spiderwebs out of the way so you guys can enjoy!
From rockpicker on Sun, 06/24/2018 - 9:22pm - Greensfelder (St. Louis Area)
It was a humid trail today, but there was more horse poop than mud. Maybe a little rain late in the day.
From honcho on Sun, 06/17/2018 - 2:42pm - Greensfelder (St. Louis Area)
3 trees down - 1) entrance to green rock trail, headed towards Rock Resv. 2) Within 100 feet of rock wall switchback on Declue, down from radio tower 3) bottom of Eagle Valley descent from ranger station
From Maholt32 on Tue, 06/12/2018 - 5:00pm - Greensfelder (St. Louis Area)
All good...
From BrianFalls21 on Wed, 05/23/2018 - 11:11am - Greensfelder (St. Louis Area)
Still some damp areas and rocks are slick. Maybe 80% good to go???