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 smdods on Tue, 12/11/2018 - 2:06pm - Greensfelder (St. Louis Area)
Rode DeClue at 10AM from Muckerman Shelter CCW - it was good up until Old DeClue, which was just starting to turn mushy. So, same as others commented - ride 'em early or forget it. Cleared a bunch of deadfall that was not jumpable.
From Travis Arnold on Sun, 12/09/2018 - 4:00pm - Greensfelder (St. Louis Area)
Leaf covered, but not bad where it's frozen. Sun facing slopes suuuuuper greasy (DeClue Six Flags side.
From mhayes on Sun, 12/02/2018 - 7:04pm - Greensfelder (St. Louis Area)
can't vouch for all the trails but i did see some pretty muddy bikes out there today so I'm *assuming* it's at least a yellow level for trail moisture. my prediction is this will be a tough year on the park with all the moisture/thaw.
From mhayes on Sat, 11/24/2018 - 6:08pm - Greensfelder (St. Louis Area)
The utility company is saying that trenching would be at a high level today and tomorrow. Unless you plan on helping with your bike tires I’d steer clear.
From rhadrj on Wed, 11/21/2018 - 8:41pm - Greensfelder (St. Louis Area)
Unbelievably good condition. Only saw a bit of mud up Eagle Valley climb from horses. Other than that, it was dry.
From The Krackheads on Mon, 11/12/2018 - 4:07pm - Greensfelder (St. Louis Area)
walked a fair amount to get some dead fall, it was slimy and sloppy at 1pm,