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 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???
From mhayes on Fri, 05/18/2018 - 4:38pm - Greensfelder (St. Louis Area)
Regionally wet, maybe by sunday? maybe not...
From Maven on Thu, 05/17/2018 - 1:10pm - Greensfelder (St. Louis Area)
All is well and should be hero dirt by the time people see this. Watch out for trail debris lots of sticks and such. Also a few face slappers and stabbing sticks. I took care of a few. Oh and tics!
From The Krackheads on Tue, 05/15/2018 - 11:13am - Greensfelder (St. Louis Area)
Was rideable prior to the last down pour-RED trail today kiddos.
From honcho on Mon, 05/14/2018 - 9:10am - Greensfelder (St. Louis Area)
Trail is green - Tree down .4 miles from overlook on Beulah, towards the drop/bermed turns, away from the newest, "design/build/ride section.
From Randster on Sun, 05/06/2018 - 9:27am - Greensfelder (St. Louis Area)
Haven't been there today but since GORC posted yesterday that the race was marked and mentioned nothing about mud or bad conditions, I am bumping this back to green. I may be wrong but I'll risk it.