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Dagny Johnson Key Largo Hammock Botanical State Park

 About Dagny Johnson Key Largo Hammock Botanical State Park

An aerial view of Dagny Johnson Key Largo Hammock Botanical State Park.


Previously known as one of Key Largo’s “best-kept secrets,” this park has become a favorite of residents and tourists alike. Visitors quickly become stewards for the environment, as the park is home to 84 protected species of plants and animals. Created to protect the unique status as a tropical hardwood forest in the United States, the park’s focal point is a self-guided nature walk along the main trail. At the “circle” one will find a native plant butterfly garden and a picnic table (please pack out your trash). In early fall, visitors may still need insect repellent and long sleeves and pants to ward off the mosquitoes. As the warm rainy season gives way to the cooler dry season, the mosquitoes will disappear.

The Port Bougainville Trail extension lengthens your walk by one or two miles on the loop trail. Use of this trail no longer requires a backcountry permit, but visitors must stay on the designated path. Additional backcountry trails may be explored simply by completing a backcountry permit at the John Pennekamp Coral Reef State Park Ranger Station.

The park operates on the honor system, so please fill out an envelope, enclose your entrance fee and deposit in the 'Iron Ranger.' Your support of this unique gem of a Florida State Park will ensure survival of its environment for generations to come. Explore and enjoy the park today!


The Great Florida Birding Trail Logo


  • The main entrance and marked nature trail at Dagny Johnson Key Largo Hammock Botanical State Park is located on Monroe County Road 905, approximately .5 miles north of County Road 905's intersection with U.S. Highway 1 at Mile Marker 106.


  • For forms, information and benefits of volunteering visit Get Involved.



  • Florida State Parks Pet Policy
  • Pets are permitted in the picnic areas, along the sea wall, bike trails and hiking trails. Service animals are welcome in all areas of the park, as required by law.