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 Eazy_E on Tue, 12/10/2019 - 2:15pm - Greensfelder (St. Louis Area)
Rode Fossil Ridge and Beulah, totally green if frozen. It was starting to thaw at 1130. Avoid otherwise.
From yellkayak on Thu, 12/05/2019 - 11:12am - Greensfelder (St. Louis Area)
Rode all of Beulah and some of Declue everything was in good shape. I did not pickup any mud. Time to go before it rains.
From flyindoc on Wed, 11/27/2019 - 3:40pm - Greensfelder (St. Louis Area)
Declue and Dogwood trailheads were dry on West side of Allenton road, however, encountered signs warning of managed hunt.
From rmhchs on Sun, 11/24/2019 - 4:51pm - Greensfelder (St. Louis Area)
Dogwood is good - only wet in a few spots . . . Green Rock . . . about 20% wet . . . but good thing is both trails are covered with leaves so mud does not stick too much to tires.
From bveldt on Sat, 11/23/2019 - 8:22pm - Greensfelder (St. Louis Area)
Rather than ride I went for a trail run on Beulah and Fossil Ridge. The trail was wet and slick but quite firm. I suspect it will be rideable on Sunday. Unsure of condition of Declue.
From swissman on Tue, 11/19/2019 - 5:45pm - Greensfelder (St. Louis Area)