L-31e is a hiking, biking, and horse trail in Miami-Dade County, Florida. It is within Biscayne National Park. It is 15.3 miles long and begins at 2 feet altitude. Traveling the entire trail is 20.9 miles with a total elevation gain of 7 feet. The S-20A, S-20, and S-21A spillways can be seen along the trail. The trail ends near the S-20F spillway.
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