The Greensfelder County Park is one of the most challenging places to run in the St. Louis area. Unlike nearby Six Flags Amusement Park, this trail is a natural roller coaster with no admission charge and no $8 cheese sandwiches. There is a series of 25 miles of very challenging trails. Be prepared for technical single track, steep climbs and descents over big rocks and roots. Not much fun when it is muddy. This trail can be connected to nearby Rockwood Reservations for an all-day trail running or hiking epic. This area was once owned by local environmentalist and open space supporter A. P. Greensfelder. This park has 1,758 acres of oak and hickory forest. In addition to hiking/running trails, it has a nature learning center, camping and more. This is a good choice if you are looking for solitude, since not too many runners come here. The trails are rocky and the terrain is challenging! Warning: come summer time there are enough ticks here to make a hound dog never leave the porch again. Directions: from St. Louis go west on 1-44. Get off at the Allenton-Six Flags exit. Go north past Six Flags on Allenton Road for two miles, enter the park. Near the Visitors Center, park in the gravel parking lot on the left.

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