Green Turtle Hammock Nature Trail

Overview

This is a short, quiet loop through an 8.7‑acre tropical rockland hammock at Mile Marker 81.2 (bayside) on Upper Matecumbe Key. Expect dense, shady forest, a surprising solution hole that sometimes smells faintly of sulfur, and a peek at Keys tree cactus sprouting from limestone. It’s a gentle walk but feels wild and close—more nature ramble than “hike.” Entry is free and the preserve is open daily 8 am–5 pm.

Trail Experience

The loop is roughly 0.4 miles total. The tread is narrow and occasionally threads between trunks and exposed limestone, so you’ll move at a stroll, not a stride. The path skirts an interior boat basin and traces an ecotone where mangroves meet hardwood hammock—great for seeing how the Keys’ habitats fit together. A historic pioneer home anchors the setting near the entrance, with picnic tables and a small playground out front.

What Stands Out

Two features make this little walk memorable: the karst “solution hole” you circle (that sulfur note hints at groundwater moving below the rock), and the chance to see Keys tree cactus clinging to the limey outcrops. It’s also a good sampler of a now‑rare habitat that once dominated the Keys.

Logistics

Park just inside the gate; facilities are minimal (portable toilet only). Leashed pets are allowed. There’s a canoe/kayak launch by the basin—use it to drop boats, then park back near the gate—but the setup can be awkward. The preserve lies along the Florida Keys Overseas Heritage Trail, but bikes don’t belong on this narrow footpath; ride the paved trail instead.

Hazards and Etiquette

Poisonwood is common beside the narrow tread—do not brush vegetation. Heed posted crocodile warnings near the water, keep kids and pets well away from the edge, and never feed or approach wildlife. Bring bug spray, closed‑toe shoes, and water; shade helps with heat, but humidity is real.

Best Time to Hike

Aim for morning when the preserve opens (8 am) for cooler temps, softer light under the canopy, and fewer bugs. Dry season tends to be less buggy than the steamy summer months. Weekdays are typically mellow; this is rarely crowded, but limited parking can fill on nice weekends.