Spite Highway Trail

Spite Highway Trail follows a long north–south cut through the middle of Elliott Key. To cover both arms from the central junction, walk north to its beach and return, then take the south arm past its coastal viewpoints to the forest endpoint and return. The full mapped itinerary is about 15.8 miles and takes roughly 7–8 hours; that figure covers both arms but not the roughly 0.4-mile approach from the harbor on Elliott Key Loop. Published distances differ at the endpoints: the park describes the cut as about six miles down the island, while trail descriptions range around seven. Treat the full total as an estimate. Most day visitors should choose one arm: the north beach is about 4.8–6 miles round trip, and the southern viewpoints make a roughly 6-mile outing.

The route is mostly level and smooth, with a noticeable rise as the south arm enters dense forest. The narrow path follows a straight, one-lane corridor under tropical hardwood hammock. Where the canopy opens, limestone and pieces of fossilized coral reef show through the forest floor. Farther south, the track loses a little elevation and threads through buttonwood, with bits of hammock on higher ground. This is a shaded forest walk, not a shoreline trail; the ocean views come from short side paths near the southern end.

Head north from the junction for roughly 2.4 to 3 miles to a curved Atlantic-facing beach beyond Sea Grape Point. The beach is the clear turnaround, with the Fowley Rocks light station visible offshore. Depending on which endpoint measurement you follow, return mileage is about 4.8 to 6 miles. It is the shorter of the two arms and gives you a coastal finish after a quiet walk beneath the canopy. At the beach, frame the curve with the light station on the horizon.

The south path starts low near the campground, climbs into tropical forest, then eases through buttonwood and small patches of higher hammock. Around three miles in, side paths reach Petrel Point, looking toward the Atlantic, and Sandwich Cove, facing Biscayne Bay. These outlooks are the best reason to continue south; they make a useful turnaround for a roughly 6-mile round trip. The main cut continues beyond them and ends abruptly in buttonwood without a major destination; the distance from the viewpoints to that endpoint is uncertain. Bring a map for the spur choices and turn back from the views if that is the amount of walking you planned.

In 1968, landowners bulldozed a six-lane, roughly seven-mile swath down Elliott Key to make the island less appealing to people trying to preserve it. The move became part of the fight that led to Biscayne National Monument being established that same year. The road was never built; the name stayed with the cut. After decades of regrowth, the former wide clearing is now a narrow passage through hardwood forest, with its straight line still visible in the route.

Elliott Key has no road or ferry service. Arrive by boat or paddle to the harbor, then follow Elliott Key Loop about 0.2 mile to the Spite Highway junction; the trail distance above begins there. The harbor has 33 boat slips. Restrooms, cold-water showers, picnic tables, grills and a water source are at the campground and marina, but there are no sales facilities and nothing to buy along the trail. The park recommends bringing your own drinking water in case the harbor generator fails. Mosquitoes and no-see-ums occur year-round and are worst in summer. Leashed pets are limited to developed areas, and hiking guidance excludes dogs from the trails, so do not assume a pet allowed at the campground can accompany you on this route.