Grotpeter Trail is a hiking and biking trail in St. Louis County, Missouri. It is within Castlewood State Park. It is 2.5 miles long and begins at 436 feet altitude. Traveling the entire trail is 5.0 miles with a total elevation gain of 871 feet. Near the trailhead there are parking and restrooms. Trailhead and another parking can be seen along the trail. There is also an information along the trail.
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